Whether you're diving a shallow reef or filming a shipwreck at 100 feet, the right underwater camera can turn an enjoyable dive into an unforgettable one. As a dive instructor and an underwater photography specialist with over 50 years of experience, I've tested just about every kind of camera setup available—from rugged phone housings to dedicated 4K camera rigs, all with varying results.

In this guide, I’ll walk you through the top five performing underwater cameras across key categories, including budget friendly cameras that are beginner ready and action focused for the best videos and still images. These aren’t just basic spec sheet picks they’re tools I’ve seen perform in real dive conditions, with real divers giving great results time and time again.

SeaLife SportDiver Ultra Housing

Best Budget Underwater Camera

Why We Love It

It’s one of the most accessible ways to start underwater digital photography, especially if you already own a high end smartphone. With depth protection up to 130 feet, leak alarms, and Bluetooth shutter control, it’s a serious tool disguised in an approachable package. The design is intuitive, and it integrates easily into most dive setups using optional arms and lighting.

Reasons to Avoid

If your smartphone doesn’t have a great camera, you’re limited out of the gate. It also lacks built-in lighting, which means your results may be blue-tinted or grainy past 15–20 feet without external light. Touchscreen responsiveness can lag slightly when wet, and the housing adds bulk to your otherwise compact phone.

From the Field

I’ve recommended the SportDiver to many first-time underwater shooters, especially students just certified or travelers on reef-hopping trips. It’s a great match for shallow dives, shore entries, and anyone who wants to capture photos on the fly without building a full camera rig. I’ve used it during shallow training dives and snorkel sessions where bulkier equipment would’ve been overkill. The leak alarm gives real peace of mind, and when paired with a small light, the image quality will be better than you expect, especially on modern iPhones.

Technical Details

• Camera Type: Smartphone housing
• Compatible Devices: Most iPhones (8 through 16 Pro Max), Samsung Galaxy S Series Ultra models, Google Pixel range
• Depth Rating: 130 feet (40 meters)
• Controls: Bluetooth LE 5 wireless connection with app-based interface
• Safety Features: Dual leak alarms (vacuum and moisture sensors)
• Lighting Support: Compatible with Sea Dragon lights and tray systems
• Material: Polycarbonate with stainless steel and aluminum hardware
• Power Supply: 2 AAA batteries (approx. 50 hours of continuous use)
• Dimensions: Approx. 9.1” x 4.9” x 2.4”
• Weight: Less than 1.78 pounds (808 grams)
• Best For: Beginners, snorkelers, travel divers
• Not Recommended For: Deep divers or professionals needing lighting and lens control

Kraken Smart Housing KRH08 V2

Best model for Beginners

Why We Love It

The Kraken KRH08 V2 is a versatile underwater housing that transforms your smartphone into a powerful diving camera. With a depth rating of 280 feet, it's ideal for both recreational and technical divers. The vacuum seal system adds an extra layer of safety, and the housing is compatible with lenses and video lights, giving users the flexibility to upgrade.

Reasons to Avoid

Performance is still limited by your smartphone’s camera. It lacks built-in lighting, and its aluminum construction adds some weight. The interface may feel complex to complete beginners unfamiliar with diving accessories.

From the Field

I’ve used the Kraken housing on deep reef dives and found it reliable, even at depths many other housings don’t reach. It’s a great choice for divers who want more depth range and expandability without moving to a dedicated underwater camera. The vacuum seal system is a major confidence booster, you know the housing is airtight before you even enter the water.

Technical Details

• Camera Type: Smartphone housing
• Compatible Devices: Phones up to 175mm x 85mm x 8mm
• Depth Rating: 280 feet (85 meters)
• Controls: Bluetooth shutter, app-based camera control
• Safety Features: Vacuum seal system with pressure check
• Material: Aluminum and polycarbonate
• Power Supply: 1x 18650 rechargeable battery
• Mounting Options: Multiple accessory mounts (M6, 1/4”-20)
• Best For: Intermediate divers, tech divers, underwater content creators
• Not Recommended For: Casual snorkelers or those needing an ultra-light setup

DJI Osmo Action 5 Pro Diving Combo

Best for Action Shots

Why We Love It

Compact, tough, and built for movement, the Osmo Action 5 Pro shoots buttery-smooth 4K videos even when you're in currents or chasing wildlife. It’s waterproof to 60 meters with its housing, making it a reliable travel companion for adrenaline-driven dives.

Reasons to Avoid

It’s a video first device, and photo settings are more limited. No RAW photo format, and no optical zoom. Also, it requires a dive case for depths beyond 33 feet.

From the Field

I’ve used the Osmo on drift dives and fast paced free dives. The stabilization tech is impressive, no post processing is required. The dual screen is great for vlogging or selfies, and the dive case locks tight without fuss. For divers who prioritize video over stills, this is a go to option.

Technical Details

• Camera Type: Action camera
• Sensor: 1/1.3” CMOS, 40MP
• Video Resolution: 4K at up to 120fps
• Photo Resolution: 40MP JPEG
• Stabilization: RockSteady 3.0, HorizonSteady
• Depth Rating: 60 meters (with housing)
• Display: Dual OLED (front and rear)
• Battery Life: Up to 155 minutes (1080p at 30fps)
• Power Supply: Removable 1720mAh battery
• Best For: Freedivers, vloggers, high-motion dives
• Not Recommended For: Manual shooters, still image specialists
  

Available from Amazon

SeaLife Micro 3.0 Pro 3000 Auto Set

Best for Video Quality

Why We Love It

This set combines the Micro 3.0 camera with Sea Dragon 3000F light for incredible video clarity. It’s leakproof, sealed, and comes with a wide angle lens, so you can light and shoot your dive like a pro right out of the box.

Reasons to Avoid

It’s not modular; you can’t change the lenses or sensors. It’s also a bit bulky compared to compact setups, not ideal for travel light divers.

From the Field

For divers who want to buy a stunning 4K video with true color at any depth, this is the setup I recommend. I’ve used it on wreck dives and night dives where visibility is low, the 3000-lumen light makes a massive difference. You get pro-level footage with almost no learning curve.

Technical Details

• Camera Type: Dedicated underwater camera with integrated light
• Sensor: 16MP SONY CMOS
• Video Resolution: 4K at 30fps, 1080p at 120fps
• Lighting: Sea Dragon 3000F (wide beam, auto brightness)
• Lens: 100° wide-angle
• Memory: 64GB internal
• Battery Life: 3+ hours photo / 2+ hours video
• Depth Rating: 200 feet (60 meters)
• Best For: Night dives, cave/wreck videos, advanced content creators
• Not Recommended For: Travelers needing lightweight kits, lens-interchange fans

SeaLife Micro 3.0

Best for Image Quality

Why We Love It

It’s compact, completely sealed (no o-rings), and built specifically for underwater photography. Shoots RAW and JPEG with true colors, and handles both macro and wide shots decently. A great all-arounder.

Reasons to Avoid

No lens changes, it has built-in memory only. You’ll need accessories for serious lighting. It’s not the most compact rig when mounted.

From the Field

The Micro 3.0 has been my choice for reef photography when I want to keep it simple but professional. The large buttons are glove-friendly, and the images it captures, even without lighting, are crisp and well-balanced. It’s a smart camera for serious divers who don’t want DSLR complexity.

Technical Details

• Camera Type: Dedicated underwater camera
• Sensor: 16MP SONY CMOS
• Video Resolution: 4K at 30fps, 1080p at 120fps
• Lens: 100° wide-angle
• Memory: 64GB internal (no expansion slot)
• Battery Life: 3+ hours photo / 2+ hours video
• Depth Rating: 200 feet (60 meters)
• Best For: Still shooters, compact pro kits, intermediate to advanced divers
• Not Recommended For: Lens-switchers, minimalists, RAW-only workflows

Things to Consider When Buying a Scuba Diving Camera

Depth ratings explained in context

Most recreational dives stay between 60 and 100 feet. A camera rated to 130 ft, like the SeaLife SportDiver, is ideal for snorkelers, new divers, and casual underwater photography. For deeper dives, a 200+ ft rating—like in the SeaLife Micro 3.0 or Kraken KRH08—offers more flexibility and safety.

Battery life & Charging considerations

If you’re shooting continuous 4K video, expect battery life to dip under an hour. Still photography setups can often last a full dive or more. Be aware of recharge times and whether your camera allows battery swaps—especially on liveaboard trips or multi-dive days.

Editing & Storage workflow

4K video and RAW files require serious storage. The SeaLife Micro 3.0 offers 64GB of internal memory, but always carries an external backup or SD card reader—especially on longer trips.

Recommended accessories that make a big difference

Even top-tier cameras need a little help:

• Red filters restore warm tones lost past 15 ft
• Float arms improve balance for larger rigs
• Lights are essential beyond 30 ft, especially in caves, wrecks, or night dives

Even the most advanced sensor won’t capture reef colors accurately past 30 feet without added light. A red filter or video light can mean the difference between a murky snapshot and a magazine-worthy image.

Educational Enhancements — Why Water Changes Your Photos

Water absorbs light from red to blue—red disappears first, usually within the top 15 feet. That’s why your photos often look blue-green unless you add light or use a red filter.

Compact vs DSLR vs Phone-Based Systems

• Phone housings (SeaLife, Kraken): Best for travel, beginners, and flexibility
• Compact cameras (SeaLife Micro): Balance between quality and simplicity
• DSLR/mirrorless rigs: High-end, modular, heavy, for pro-level shooters

In my experience, divers use gear that’s easy to carry and operate. The best camera is the one you’ll actually take on every dive.

Whether you're preparing for your first reef dive or producing professional content, these underwater cameras offer reliability, quality, and depth-appropriate features for every kind of diver. Tested and trusted by Bob Collins and the team at Divers Supply—so you can focus on the dive, not the gear.

Frequently Asked Questions

What’s the best underwater camera for snorkeling?

The SeaLife SportDiver or ReefMaster RM-4K are excellent, lightweight options for shallow water.

Do I need extra lights for my camera?

It’s recommended, especially past 30 feet. Light fades quickly underwater. The SeaLife Micro 3.0 Pro Set includes a powerful Sea Dragon light built specifically for this.

Can I use my phone underwater safely?

Yes. If it’s in a certified housing like the Kraken Smart Housing or SeaLife SportDiver, both with depth ratings and leak protection.

What’s best for freediving or high-movement dives?

The DJI Osmo Action 5 is ideal. Lightweight, fast, and designed for capturing motion.

If you have been scuba diving, you have probably squeezed into a wetsuit, and you know what it feels like. Maybe it felt like an endurance sport just to be put on, or perhaps you experienced that uncomfortable flushing sensation when cold water rushes into a suit that's too loose.

We've all been there. Getting the correct wetsuit sizes is about comfort, safety, and performance. A well-fitted wetsuit is considered one of the most important accessories for enjoying surfing or underwater adventures, so you don’t feel cold and miserable.

Proper wetsuit sizing is necessary, no matter how experienced you are. Whether preparing for your first dive or shopping for a different water activity, you want to buy the right wetsuit that fits like a glove. You need to pay close attention to a size guide to understand how wetsuits should fit on you and what sizes best match your body and needs. Let’s look at how to buy the right wetsuit for your body and enjoy plenty of underwater explorations.

What Size Wetsuit Do I Need?

The right wetsuit sizes depend on your body measurements, including height, weight, chest, waist, and hip circumference. To determine your ideal size on a wetsuit size chart:

• Take accurate measurements of your body (instructions below)
• Compare your measurements to brand-specific size charts
• Consider your body shape and personal preferences
• Understand wetsuit sizing labels to decode manufacturer information

Remember: a properly fitting wetsuit should feel snug but not restrictive. Unlike regular clothing, wetsuits are designed to fit closely against your skin.

Understanding Wetsuit Sizing Labels

Wetsuit sizing can seem confusing with various labeling systems across different brands. Here's what common size labels mean:

Numerical Sizing Chart (Most Common)

• Men: Usually range from 2XS/XXS (smallest) to 3XL/XXXL (largest)
•  Women: Typically range from 2XS/XXS to 2XL/XXL

Height/Weight Sizing

Some brands use height and weight (kg) as primary indicators. For example:

• MT = Medium Tall (for someone with a medium build but taller than average)
• LS = Large Short (for someone with a large build but shorter than average)

Body Type Sizing

Some manufacturers include descriptors that indicate body type:

• A = Athletic build (broader shoulders, narrower hips)
• F = Full-figured (proportional throughout)
• S = Slim build

Specialized Wetsuit Size Guide

You might see labels that address specific body proportions:

• LT = Large Tall
• MS = Medium Short
• LF = Large Full

Men's Wetsuit Sizing

Men's wetsuits are designed with a male physique in mind, generally accounting for broader shoulders and narrower hips. Here's how to measure yourself for a men's wetsuit:

• Chest: Measure around the fullest part of your chest, keeping the tape measure level.
• Waist: Measure around your natural waistline at the narrowest point.
• Hips: Measure around the fullest part of your hips.
• Height: Measure from the top of your head to the soles of your feet.

Most men should focus on chest and height measurements as primary indicators for wetsuit size, with weight as a secondary factor.

Women's Wetsuit Sizing

Women's wetsuits accommodate female body contours with more hip and chest room and a more defined waist. For women's wetsuit sizing:

• Chest: Measure around the fullest part of your bust.
• Waist: Measure around your natural waistline.
• Hips: Measure around the fullest part of your hips/buttocks.
• Height: Measure from the top of your head to the soles of your feet.

Women should prioritize chest, hip, and waist measurements when they select a wetsuit size.

How to Tell if a Wetsuit Fits Properly

A properly fitting wetsuit should:

• Feel Snug But Comfortable
• The wetsuit should feel like a second skin, with no significant gaps or loose areas
• There should be no pinching, binding, or restriction of movement
• You should be able to reach your arms overhead and squat without extreme resistance

Signs of a good wetsuit fit

• No prominent wrinkles or folds in the neoprene
• No water-entry gaps around the neck, wrists, or ankles
• No excessive pressure on your shoulders or restriction across your chest
• Ability to zip up entirely without extreme effort
• Proper length in arms and legs (reaching to wrists and ankles without excessive bunching)

Test the Fit Actively

Before you buy your wetsuit, check the following:

• Mimic swimming motions with your arms to assess how easily you can swim and move your arms
• Squat and bend as if sitting on a surfboard
• Raise your arms overhead to check shoulder mobility
• Bend forward at the waist to ensure no gaping at the neck

Remember: Neoprene will stretch slightly with use and mold to your body over time, but a wetsuit should never feel uncomfortably tight or restrictive.

Size Charts for Popular Brands

Different brands use different sizing standards. Always refer to the brand's size chart before you buy your wetsuit. Here are general sizing tips for some popular diving and watersports wetsuit brands:

Akona

Akona offers detailed size charts based primarily on height and weight, with chest and waist measurements as secondary indicators. They provide specific sizing for men and women, focusing on dive-oriented wetsuits.

Aqualung

Aqualung uses a comprehensive sizing approach, including height, weight, chest, and waist measurements. Their wetsuits often feature standard and tall options with specialized fits for diving activities.

Bare

Bare provides detailed size charts with multiple body measurements. They're known for having many fits, including standard, tall, and short options, to accommodate different body types for recreational and technical diving.

Cressi

Cressi's sizing system focuses on height and chest measurements as primary indicators. Their wetsuits typically follow European sizing standards with detailed measurement conversions for international customers.

Mares

Mares offers comprehensive size charts including chest, waist, hip, and height measurements. They provide specific charts for men and women, and sizing can vary between their recreational and technical lines.

Neosport

Neosport provides straightforward sizing based primarily on height and weight ranges. Their wetsuits feature a more generalized fit with standard sizing options that are accessible for various water activities.

Pinnacle Aquatics

Pinnacle Aquatics incorporates detailed measurements including height, weight, chest, waist, and hip dimensions. They offer specialized fits for different diving applications, while some models feature gender-specific designs.

ScubaPro

ScubaPro has one of the most detailed sizing systems, incorporating multiple body measurements and offering specialized fits including standard, tall, and short options. Their charts often include specific recommendations based on diving style and experience level.

Tips for Getting the Right Size

When in doubt, go smaller

A slightly too-tight wetsuit will eventually conform to your body, while a too-loose wetsuit will never provide proper insulation.

Consider wetsuit thickness

Thicker wetsuits (4/3mm, 5/4mm) may feel more restrictive than thinner suits (2/3mm, 3/2mm) in the same size.

Try before you buy

Whenever possible, try on wetsuits before purchasing. Bring your swimwear and allow 5-10 minutes to put on each wetsuit properly.

Check seasonal variations

Some brands offer "summer" and "winter" cuts in the same size, with winter cuts allowing for additional layering.

Read reviews

Other surfers and divers with similar body types can provide valuable insights on how specific brands and models fit.

Consider your activity

Surfing wetsuits generally have more shoulder mobility than diving suits, while triathletes often prefer greater flexibility throughout.

Wetsuit Sizing at Divers Supply

Finding and shopping for the perfect wetsuit size can take some time and experimentation, but the effort is worth it for the comfort and performance benefits of a properly fitted suit. Our staff at Divers Supply is happy to help you choose the right wetsuit size and advise you on which size best suits your body and underwater activity. Don’t hesitate to contact us with your questions.

Pick your new diving suit today and enjoy free shipping on orders over $25. Shop now and subscribe to our newsletter for exclusive updates and offers. Your next favorite wetsuit is just a click away!

A wetsuit's sleek, second-skin appearance might seem straightforward, but what do you wear under it?

Since their invention in the 1950s, wetsuits have revolutionized how we enjoy and experience water activities in varying temperatures.

What you wear under your wetsuit affects how comfortable — or not — you feel and how much and how well you enjoy your underwater explorations. The right choice means you feel comfortable and can spend time scuba diving. The wrong choice means you get out of the water quickly feeling miserable, uncomfortable, and cold.

So, let’s see what you could choose to wear under your wetsuit to maximize how much you enjoy your scuba diving.

Common Undergarment Options

For Everyone

Rash Guards/Compression Shirts

These form-fitting, quick-drying garments protect your skin from the neoprene and prevent the notorious "wetsuit rash" that can occur from repetitive movement against the suit's seams and material.

They also add a thin but effective thermal layer that helps trap more body heat. Rash guards are available in various thicknesses and sleeve lengths and are particularly helpful for shoulder-intensive activities like paddling and surfing.

They are made of synthetic fabrics (Lycra, polyester blends) to reduce drag in the water and wick moisture away from the body. They also offer UV protection.

Nothing (Going "Commando")

A surprising number of water sports veterans prefer wearing nothing under their wetsuits. The wearing nothing approach maximizes the direct contact between neoprene and skin, which technically improves the wetsuit's heating efficiency as it minimizes layers that can trap water and cause cooling. By going commando, you don’t have to worry about the fabric bunching, riding up, or shifting when you are the most active underwater.

However, if you like the going commando option, thoroughly rinse your wetsuit after each use for maximum hygiene and to prevent bacterial growth. It's generally not recommended if you are renting a wetsuit for obvious sanitary reasons.

Wetsuit Liners

A wetsuit liner is a very thin, full-body extra layer that looks like lightweight long underwear but has technical features designed for water immersion. These liners include thermal technologies like infrared reflection, water-repellent coatings, or brushed interiors that maximize warmth without adding bulk. They distribute pressure evenly across the body to reduce discomfort points during long diving sessions. While more expensive than other options, dedicated users find them worth the investment, especially in colder water conditions where temperature regulation is paramount.

Neoprene Shorts/Tops

These additional neoprene pieces, worn underneath your wetsuit, provide targeted insulation for core body areas. Made from the same material as the wetsuit, they integrate seamlessly with your primary wetsuit and add millimeters of insulation where it matters most.

Core body warmth prevents hypothermia and helps you enjoy your underwater exploration. These pieces are handy for activities in variable temperatures, as they can be added or removed depending on conditions. You can make your wetsuit system more adaptable to changing environments or seasons.

For Women

One-piece Swimsuits

Athletic-style one-piece suits offer comprehensive coverage with minimal seams and potential pressure points.

The continuous fabric distribution helps prevent the uncomfortable bunching or gathering that can occur with two-piece options. Modern performance swimwear incorporates compression technology, flatlock seams, and strategic panel construction, complementing rather than competing with wetsuit design.

Look for racerback or competitive styles rather than fashion-oriented designs with decorative elements that could create pressure points under the wetsuit’s tight neoprene.

Sports Bikinis

Unlike decorative beachwear bikinis, sports-oriented two-piece swimwear is specially designed for outdoor activities.

Sports bikinis are designed to stay firmly in place during activity and movement. Features like wider straps, cross-back designs, underwire-free construction, and higher necklines make these ideal for active water sports.

The fact that there is a top and a bottom can offer advantages for thermoregulation in different water temperatures. 

Wearing a bikini can make your bathroom break more comfortable. Because it can be challenging to wear a one-piece suit under a wetsuit, many women prefer sports bikinis, especially for long sessions.

Swim/Board Shorts with Sports Bras

This combination offers the support of technical sports bras and the coverage and anti-chafing benefits of swim shorts.

The sports bra component features moisture-wicking fabrics, minimal hardware, and compression without constriction for optimal comfort under pressure.

Board shorts designed for active use (rather than fashion styles) feature four-way stretch material, minimal seams, and quick-dry properties.

This pairing is perfect if you experience chafing in the inner thigh area or prefer additional coverage and support in and out of the water.

Sports Underwear Sets

Athletic-focused underwear differs from everyday undergarments in both design and materials.

Technical sports underwear sets use synthetics that control moisture, temperature, and movement.  

Unlike cotton underwear, which becomes heavy and abrasive when wet, proper sports underwear remains lightweight and reduces friction even after hours of immersion. These sets feature wider waistbands, seamless construction, and anatomical designs that prevent riding up or shifting during vigorous movement.

Rash Guard/Surf Shorts Combination

This popular pairing works against the two most common wetsuit discomforts: upper body chafing and inner thigh irritation.

The rash guard component extends protection to the torso, shoulders, and arms—areas prone to abrasion during paddling movements.

Meanwhile, the surf shorts protect the sensitive inner thigh region where repetitive leg movements can cause painful skin irritation.

Women can customize this combination of coverage and thickness to adapt to different water temperatures and activity intensity (sleeve lengths and material weights).

For Men

Swim Briefs/Jammers

Competitive swimming-style jammers extend from the waist to just above the knee and offer additional thigh protection without excess fabric that could bunch uncomfortably.

The streamlined profile of briefs or jammers integrates almost seamlessly under neoprene to limit water entry and movement resistance.

The snug elastic waistbands and leg openings are designed to stay in position no matter how hard you swim or move underwater.

Board Shorts/Trunks

Board shorts or trunks are a common choice for many male water enthusiasts, particularly if you like to combine casual beach activities with underwater exploration.

While convenient, standard board shorts come with drawbacks when used under wetsuits.

Excess fabric may gather along the legs and waistline, creating uncomfortable pressure points and potential water channels, decreasing thermal efficiency. Longer styles may bunch behind the knees and restrict movement.

If you still want this type of clothing, choose shorter, athletic-cut versions with minimal seams, quick-dry fabrics, and no mesh liners that could create additional pressure points.

Compression Shorts/Underwear

Compression shorts support muscles and help with moisture build-up.

The graduated compression technology in premium versions can improve blood circulation during long sessions. These purpose-built undergarments feature flatlock seams positioned away from potential pressure points, antimicrobial treatments to prevent odor development, and strategic ventilation zones to manage moisture.

The body-hugging nature of compression gear integrates naturally with the similar pressure profile of a properly fitting wetsuit.

Rash Guard with Briefs

This combination works for upper and lower body protection.

The rash guard component protects the torso and arms during paddling movements. The athletic briefs support and protect without excess material that could bunch or gather. This pairing is easily customizable to different conditions: you can choose different rash guard weights and sleeve lengths, from lightweight, short-sleeve versions for warm water to thermal, long-sleeve options for colder conditions.

Key Factors Influencing Your Choice

Water Temperature

Cold Water (Below 60°F/15°C)

Specialized thermal rash guards with technologies like hollow-fiber insulation, infrared heat reflection, or titanium-infused fabrics can keep your core temperature steady. Neoprene shorts with sealed seams provide additional millimeters of insulation for your core region, where you need to stay warm.

Full wetsuit liners with brushed interiors add a thermal boundary layer that traps and recirculates body heat.

Moderate Water (60-70°F/15-21°C)

These middle-range temperatures offer the most flexibility in terms of undergarment selection.

Standard-thickness rash guards insulate enough to prevent overheating. Personal comfort and activity type are often the deciding factors under these conditions.

Longer sessions require more comprehensive coverage to prevent the gradual cooling effect, occurring even in moderate temperatures. The seasonal transition periods (early summer or late fall) often fall into this temperature range, making layering the perfect choice.

Warm Water (Above 70°F/21°C)

In tropical or heated conditions, the primary concern shifts from heat retention to not feeling overheated. Minimal undergarments let your body's natural cooling system function.

Many experienced warm-water divers prefer going without undergarments entirely in these conditions, while others opt for the thinnest possible rash guards primarily for chafe protection rather than insulation. The wetsuit is often thinner in these environments (2-3mm versus 4-6mm for colder conditions).

Activity Type

Surfing

Surfers want flexibility across the shoulders and upper back, which means minimal restriction in these areas. The repetitive paddle motion commonly causes underarm and chest chafing, which means undergarments should protect them.

Diving

Water pressure increases with depth, compressing neoprene and reducing its insulation value—a 5mm wetsuit might effectively provide only 2mm of insulation at 30 meters depth. This compression effect means you need to have effective undergarments.

When you dive, your movements are slow and limited: you don’t generate enough heat through muscle activity, which means you rely on the insulation from your wetsuit and undergarments. Divers often like full-coverage options that protect against the cooling effect of water circulation through the suit, particularly around entry points at wrists, ankles, and neck. ,

Paddle Sports

Activities like kayaking, stand-up paddleboarding, and outrigger canoeing involve continuous, repetitive upper body movement with particular pressure on specific contact points. Also, paddling means staying seated, creating pressure zones along the lower back and posterior.

Undergarments for these activities often feature reinforced panels in high-friction areas like the underarms and inner thighs.

Duration of Activity

Short Sessions

For brief water encounters lasting under an hour, the cumulative effects of minor irritations or temperature regulation issues rarely become significant problems.

Quick recreational outings give you more freedom regarding undergarments. The body can tolerate suboptimal conditions for limited periods without notable discomfort or performance impacts.

If you only go for shorter sessions, you can prioritize convenience and simplicity, rather than insulation.

However, extreme temperature conditions require the right undergarments for basic safety and comfort, even for short sessions.

Extended Sessions

Marathon surf sessions, multi-dive days, or long-distance paddling expeditions amplify every minor irritation into potentially session-ending discomfort. What begins as slight friction in the first hour can develop into painful skin abrasion as time passes.  

Extended exposures require proper chafe protection strategies, often with anti-chafing balms or lubricants and appropriate undergarments. During long sessions, the body’s energy reserves are depleted, which means the body doesn’t generate heat.

Consecutive hours in the water also test the durability and position-retention of undergarments. All these mean you should invest in warm, snug undergarments that fit like a glove under the wetsuit.

Wetsuit Ownership vs. Rental

Owned Wetsuit

If you own your wetsuit, it develops a custom fit to your body over time, with neoprene adapting to your proportions and movement patterns. This personalized compression profile interacts differently with undergarments compared to the generalized fit of rental equipment.

Owning a wetsuit means you have full control over your hygiene. You can even opt to wear nothing underneath it.

Rental Wetsuit

With rentals, hygiene is the top consideration.

Rental suits have already been worn by numerous individuals, which means you need protective barriers between your skin and the neoprene.

Rental wetsuits have standardized sizing, which can create unusual pressure points or abrasion zones that require additional protection. Rentals often come in specific thicknesses; undergarment options matter because they provide the extra insulation you need if the rental wetsuit doesn’t have the necessary thickness.

Personal Comfort & Modesty

Changing Situations

The logistics of changing into and out of wetsuits vary across different environments, from private changing rooms with shower facilities to exposed beach parking lots with minimal privacy.

The garment you choose impacts your changing experience, particularly in public settings. Full coverage options allow for more modest transitions, while minimal undergarments might necessitate changing robes, towel techniques, or other privacy solutions.

You also want to consider any pre-session preparation and post-session care. Some facilities let you rinse your wetsuit and undergarments, while others might require traveling home in damp conditions, affecting your choice of undergarments.

Personal Preference

Beyond purely technical considerations, what you need to wear depends on individual choices and comfort preferences.

Some individuals dislike minimal coverage options regardless of their technical merits, while others find full coverage restrictive or distracting.

Materials Considerations

Avoid Cotton

Despite its comfort in dry conditions, cotton is problematic when wet, as it absorbs up to 27 times its weight in water and holds this moisture against the skin.

This water retention increases overall weight, reduces thermal efficiency, and develops an abrasive texture that accelerates skin irritation during movement.

Cotton also takes time to dry, and if not washed and dried properly, it could harbor bacteria and unpleasant odors. Cotton blends should generally be avoided for wetsuit underlayers, as they retain many unwelcome characteristics even when mixed with synthetic fibers.

Prefer Synthetic/Technical Fabrics

Materials like polyester, nylon, spandex, and various blends manage moisture superbly through their hydrophobic properties that minimize water absorption and maintain structural integrity when wet.

Advanced technical fabrics sometimes include antimicrobial treatments that prevent bacterial growth and reduce odors and skin irritation.

Synthetics stretch enough so they don’t deform and keep their position even during extended sessions.

The Right Thing to ear under a wetsuit

So, what do I wear under a wetsuit?

You need to consider insulation and the type of activity you will be doing. Don’t forget the temperature of the water and your personal choices regarding comfort and practicalities. There are many options and combinations of clothes to wear under your wetsuit. When in doubt, our Divers Supply staff is always happy to help you choose the best choice for your needs.

Have you ever felt the shock of cold water take your breath away? Have you had to cut a great session short because your fingers went numb? That's where the wetsuit vs. drysuit decision becomes important.

The right open-water swimming suit keeps you warm and comfortable, making for an enjoyable underwater experience. It's the difference between an epic day on the water and a miserable (or potentially dangerous) experience. Think of it as the main gear decision you'll be making for cold-water temperatures.

Wetsuits and drysuits, with their thick layers underneath, solve the same problem: keeping you functioning in cold water environments. However, they each tackle this challenge through completely different approaches. One lets water in (counterintuitively), while the other blocks water from entering the body.

What is the difference between wetsuits and drysuits? Which system works better? 

Wearing a drysuit or a wetsuit depends entirely on your needs. Water temperature, activity intensity, submersion duration, and even heat loss all play an important role.

Our Divers Supply wetsuits vs. drysuits guide cuts through the technical jargon to give you practical advice on which case they can be worn and experience-based advice on selecting between these systems. We'll cover everything from basic principles to real-world performance differences across various water activities.

Drysuits and wetsuits are made for almost any water adventure you wish to undertake, whether it’s deep diving, water sports, charging waves, paddling remote coastlines, or responding to water emergencies. Once you know which is the right gear that matches your needs, you will be able to improve your performance and enjoy every single underwater adventure you choose.

What Are Wetsuits Used For?

Wetsuits are suitable for a wide range of water activities where you expect to get wet. They're made from neoprene, a synthetic rubber material that traps a thin layer of water between your body and the suit. Your body heat warms this water, creating thermal insulation that helps maintain your core temperature while submerged.

Wetsuits are ideal for water activities such as surfing, recreational scuba diving in warmer waters, snorkeling, swimming in cooler waters, paddleboarding, kiteboarding, wakeboarding, triathlon swimming legs, and more.

The thickness of a wetsuit (measured in millimeters) determines its thermal protection. The thicker the neoprene, the warmer the suit. Remember that thicker suits reduce your flexibility.

What Is a Drysuit?

Unlike wetsuits, drysuits are designed to keep you completely dry. These suits feature watertight seals at the neck, wrists, and ankles, along with waterproof zippers. Instead of using water as an insulating layer, drysuits create an air barrier between your body and the suit. This layer of air provides excellent insulation, especially in extremely cold water temperatures.

Drysuits are constructed from various materials, including vulcanized rubber, crushed neoprene, trilaminate fabrics, or membrane fabrics. They function as a waterproof shell, with thermal insulation provided by the clothing worn underneath.

What to Wear Under a Drysuit

The beauty of drysuits is the ability to customize your thermal protection since you can choose the suitable undergarments. What you wear depends on water temperature and your activity level:

• Base layer: Moisture-wicking materials like polyester or merino wool that pull sweat away from your body
• Mid layer: Fleece or thermal insulation garments for additional warmth
• Drysuit undergarments: Purpose-designed thermal layers specifically made for drysuits with varying thicknesses
• Socks: Thick thermal socks or drysuit-specific booties

Many divers wear a "one-piece wonder" or specialized drysuit diving undergarment that provides full-body insulation in a single garment. You can even wear multiple layers for maximum thermal protection from extreme cold.

Are Drysuits Waterproof?

Yes, drysuits are completely waterproof by design. They use several mechanisms to maintain waterproof integrity:

• Watertight seals: Made from latex, silicone, or neoprene at the neck, wrists, and sometimes ankles
• Waterproof zippers: Heavy-duty, airtight zippers that prevent water entry
• Sealed seams: Either bonded, taped, or stitched and sealed to prevent leakage
• Valves: Many drysuits feature inlet and exhaust valves to control buoyancy and air distribution

While drysuits are designed to be 100% waterproof, they require proper care to maintain their waterproof properties. Small tears, worn seals, or damaged zippers can compromise their integrity.

Do Drysuits Keep You Dry?

When properly maintained and worn correctly, drysuits should keep you completely dry. However, there are a few scenarios where you might experience moisture inside your drysuit:

• Perspiration: During high-exertion activities, your body sweats, which can't escape through the waterproof material
• Seal leakage: Improperly fitted or damaged neck and wrist seals can allow small amounts of water to enter
• Zipper issues: Improperly closed zippers or debris caught in the zipper teeth can cause leaks
• Tears or punctures: Small damage to the suit material can allow water ingress

Most experienced drysuit users expect minimal dampness from perspiration, but any significant water entry indicates a problem that needs to be fixed.

What Are Drysuits Used For?

Drysuits keep you warm for activities in or around cold water, where staying dry is important for comfort and safety. Their primary uses include:

• Cold-water scuba diving: Especially in waters below 60°F (15°C)
• Technical diving: For deep, long-duration dives in cold environments
• Ice diving: For diving under ice or in extremely cold waters
• Commercial diving: For professional underwater work
• Sea kayaking: To prevent hypothermia during extended paddling
• Whitewater rafting: For guides and participants in cold-water rivers
• Sailing: In harsh, cold conditions where immersion is possible
• Swift water rescue: For emergency personnel working in cold water
• Fishing: For fly fishing while wading in cold streams

10 Key Differences Between a Drysuit and a Wetsuit

1. Insulation

• Wetsuits: Rely on a thin layer of water between the neoprene and your skin, which your body warms to provide insulation. The neoprene itself also provides thermal protection.
• Drysuits: Create an air barrier between the suit and your body. Insulation comes primarily from undergarments worn beneath the waterproof shell.

2. Mobility

• Wetsuits: Generally more flexible and form-fitting. They are easier to move, especially in thinner models (2-3mm). Thicker wetsuits (5-7mm) can restrict the range of motion.
• Drysuits: Usually bulkier and less flexible, especially membrane drysuits. Neoprene drysuits offer better flexibility but still less than wetsuits. The loose fit can create drag in water.

3. Life Span

• Wetsuits: Usually last 1-3 years with regular use before neoprene compression and elasticity loss affect performance. UV exposure accelerates degradation.
• Drysuits: With proper maintenance, they can last 7-15 years. Components like seals may need replacement every 2-3 years, but the suit body has much longer durability.

4. Value

• Wetsuits: Lower initial investment ($150-$600 for quality models) but higher long-term cost due to more frequent replacement.
• Drysuits: Higher initial cost ($700-$2,500+) but better long-term value due to longevity and uses across different conditions with undergarment adjustments.

5. Buoyancy

• Wetsuits: Provide natural positive buoyancy, which decreases with depth as neoprene compresses. Divers must make weight adjustments to maintain neutral buoyancy.
• Drysuits: Create variable buoyancy due to the air inside. This requires active management through exhaust valves during descent/ascent. Once practiced, drysuits make buoyancy control more complex but more precise.

6. Care and Maintenance

• Wetsuits: They are relatively simple to maintain: rinse with fresh water after use, hang dry inside out away from direct sunlight, and occasionally clean with mild detergent.
• Drysuits: More demanding maintenance including seal lubrication, zipper care with paraffin wax or specialized lubricants, proper storage to prevent creasing, and periodic professional inspections for valve and seal integrity.

7. Sports Suitability

• Wetsuits: Ideal for high-movement activities like surfing, swimming, and triathlons. Best for warmer waters or short-duration activities in moderate temperatures.
• Drysuits: Better suited for colder environments and longer immersion activities like cold-water diving, kayaking in cold conditions, and professional water work. Superior for activities where staying completely dry is necessary.

8. Fit

• Wetsuits: Should fit snugly against the skin with minimal water entry. Tight but not restrictive, with some manufacturers offering custom sizing.
• Drysuits: Fit more loosely to accommodate undergarments and allow air movement for insulation. Proper fit focuses on seal comfort at neck and wrists rather than overall body fit.

9. Environmental Impact

• Wetsuits: Traditional neoprene is petroleum-based and not biodegradable. More frequent replacement means higher waste. However, newer eco-friendly options using plant-based or limestone-based neoprene and recycled materials are becoming available.
• Drysuits: Longer lifespan means less frequent disposal. Repairs are more common than replacement. Some membrane suits use forever chemicals (PFAS) in their waterproofing, which can be environmentally concerning.

10. Comfort and Convenience

• Wetsuits: Easier to don and doff, but can feel clammy and cold initially. May cause chafing during extended use.
• Drysuits: More complex to put on and take off, they require assistance with back zippers. They offer excellent comfort in cold conditions and allow for bathroom breaks during long sessions by using a P-valve or relief zipper.

Temperature Ranges for Wet and Dry Suits

Wetsuit Temperature Guidelines:

• 80°F+ (27°C+): Rashguard or 0.5mm neoprene top
• 75-80°F (24-27°C): 2mm shorty or full suit
• 70-75°F (21-24°C): 3mm full wetsuit
• 65-70°F (18-21°C): 4/3mm full wetsuit
• 60-65°F (15-18°C): 4/3mm or 5/4mm full wetsuit with hood
• 55-60°F (13-15°C): 5/4mm full wetsuit with hood, boots, and gloves
• 50-55°F (10-13°C): 6/5mm full wetsuit with hood, boots, and gloves
• Below 50°F (Below 10°C): 7mm wetsuit or consider a drysuit

Drysuit Temperature Guidelines:

• 60-70°F (15-21°C): Drysuit with lightweight undergarments or rash guard
• 50-60°F (10-15°C): Drysuit with mid-weight thermal undergarments
• 40-50°F (4-10°C): Drysuit with heavy thermal undergarments
• 32-40°F (0-4°C): Drysuit with heavyweight undergarments, heated vests optional
• Below 32°F (Below 0°C): Drysuit with maximum insulation undergarments, heated vests recommended

Remember that your personal cold tolerance, activity level, and duration of exposure will affect your optimal choice. When in doubt, always err on the side of more thermal protection.

Exposure Suit Recommendations By Activity

Diving

• Tropical (80°F+): 1-3mm wetsuit or rashguard Shop Our Warm Water Collection
• Warm Temperate (70-80°F): 3-5mm wetsuit Shop Our Full Wetsuits
• Cool Temperate (60-70°F): 5-7mm wetsuit with hood Shop Our Cold Water Wetsuits
• Cold Water (50-60°F): 7mm semi-dry wetsuit or drysuit
• Very Cold/Ice Diving (Below 50°F): Drysuit with appropriate undergarments

Surfing

• Tropical (75°F+): Rashguard or 2mm wetsuit top
• Warm (65-75°F): 3/2mm full wetsuit Shop Our Surf Wetsuits
• Cool (58-65°F): 4/3mm full wetsuit with boots
• Cold (52-58°F): 5/4/3mm wetsuit with hood, boots, and gloves Shop Cold Water Surf Gear
• Very Cold (Below 52°F): 6/5/4mm wetsuit or consider a surf-specific drysuit

Kayaking/Paddling

• Warm Weather (70°F+, water 65°F+): Rashguard and quick-dry shorts Shop Paddling Apparel
• Moderate (60-70°F, water 55-65°F): 3mm wetsuit or paddling jacket Shop Paddling Wetsuits
• Cool (50-60°F, water 45-55°F): 4/3mm wetsuit or paddling drysuit
• Cold (Below 50°F, water below 45°F): Paddling drysuit with appropriate layers

Swimming/Triathlon

• Above 78°F: No wetsuit (may be forbidden in competition)
• 72-78°F: Sleeveless wetsuit 1.5-2mm
• 65-72°F: Full triathlon wetsuit 2-3mm
• 58-65°F: Thicker swimming wetsuit 3-4mm Shop Cold Water Swim Gear
• Below 58°F: Maximum thickness swimming wetsuit, neoprene cap, gloves Shop Open Water Swim Collection

Divers Supply for Your Diving Suits

Drivers Supply offers a wide range of suits. Our staff is always available to help you make the best choice for your needs. Whether you want to buy a wetsuit or a drysuit, Divers Supply is your go-to destination. Enjoy free shipping on orders over $25, and check out new arrivals, sale prices, and featured accessories.

Ready to buy your next suit? Shop now and stay connected with our newsletter for exclusive updates and offers. Your next favorite scuba gear is just a click away!

Note about drysuits: While we don't currently offer a dedicated drysuit collection, our team can provide personalized recommendations and ordering options from trusted manufacturing partners. Contact our specialists at [email protected] for drysuit assistance.

Frequently Asked Questions

Can I use a wetsuit instead of a drysuit to save money?

While wetsuits are less expensive, they're not suitable substitutes for drysuits in very cold conditions. In water below 50°F (10°C), a wetsuit may not provide adequate thermal protection for extended periods. Your safety should be the primary consideration.

How long will I stay warm in each type of suit?

A properly fitting wetsuit can keep you comfortable for 1-3 hours in the right water temperature range. A drysuit with proper undergarments can extend that to 6+ hours in very cold water.

Can I use my surfing wetsuit for diving?

Surfing wetsuits are not ideal for diving as they're designed for different body positions and pressure conditions. Diving wetsuits offer better insulation at depth and more flexibility in the swimming position.

How tight should a wetsuit be?

A wetsuit should feel snug like a "second skin" without restricting movement or breathing. If it's comfortable while dry but feels constrictive when wet, it's too small.

Can I repair tears in my wetsuit?

Yes, small tears and punctures can be repaired using neoprene cement or wetsuit repair kits. More extensive damage may require professional repair.

How do I know when it's time to replace my wetsuit?

You should replace your wetsuit when it shows signs of compressed neoprene (thinner material), significant fading, loss of flexibility, or if it no longer provides adequate thermal protection despite being the appropriate thickness.

Why do drysuits have valves?

Drysuits typically have an inlet valve for adding air and an exhaust valve for releasing air. These valves help manage buoyancy when diving and prevent the suit from overinflating during ascent, which could cause dangerous rapid ascents.

How do I know what size drysuit to buy?

Drysuits should allow room for undergarments, and the seals should fit comfortably at the neck and wrists. Most manufacturers provide sizing charts that consider height, weight, chest, and waist measurements. When in doubt, consult with a professional fitter.

Can I repair my own drysuit?

Minor repairs like replacing wrist seals can be done by experienced users, but major repairs to zippers, valves, or the suit material should be handled by professional repair services for absolute waterproof integrity.

How should I store my drysuit when not in use?

Store your drysuit on a wide hanger in a cool, dry place away from direct sunlight. The zipper should be lightly lubricated, fully closed, and the suit should be completely dry before storage. Some manufacturers recommend light talcum powder on latex seals to prevent degradation.