TECH SPECS:

• SKU / Part Number: DS50xxxX / CRS-DS50xxxX (xxxX designates specific color variants)

• Lens Construction: Single-window ultra-clear tempered safety glass

• Internal Volume: Low Volume

• Frame Type: Frameless (silicone skirt co-molded directly to the lens)

• Skirt Material: High-grade, hypoallergenic soft liquid silicone with a double-feathered edge seal

• Buckle System: Quick-adjust ratcheting flexible buckle assembly integrated into the skirt

• Strap Assembly: Wide split silicone strap for even pressure distribution across the back of the head

• Weight: Extremely lightweight profile (~200g)

Lens and Optical Construction

• Single-window, panoramic-style design.

• Single tempered-glass lens.

• CE-certified tempered lens according to Cressi's product documentation.

• Wide, unobstructed field of vision.

• Frameless lens-to-skirt construction.

• Lens positioned close to the face.

• Designed for underwater optical clarity.

• Available with standard clear and specialty coated lens configurations.

Frame and Construction

• Frameless construction.

• Silicone skirt bonded directly to the glass.

• No conventional rigid external lens frame.

• Compact, streamlined profile.

• Low internal volume.

• Lightweight construction.

Silicone Skirt

• High-grade soft silicone.

• Double-feathered-edge facial skirt.

• Anatomically designed facial contact surface.

• Flexible facial seal.

• Designed to reduce water leakage.

• Available in clear and opaque color combinations.

Strap and Adjustment System

• Wide split silicone strap.

• Quick-adjustable buckles.

• Buckles molded directly into the skirt.

• Flexible adjustment system.

• Even tension distribution.

• Designed to reduce drag.

Nose Pocket

• Integrated silicone nose pocket.

• Easy-access nose-gripping design.

• Allows one-handed ear equalization.

• Accessible even when wearing suitable diving gloves.

Intended Activities

• Recreational scuba diving.

• Snorkeling.

• Freediving, when properly fitted and suitable for the activity.

• General underwater exploration.

  Key Advantages

  • Unobstructed View: The single-lens design eliminates the center bridge, giving you a wider peripheral view and an open, airy feeling underwater.

  • Frameless & Foldable: Without a rigid outer plastic frame, the mask is significantly lighter and can fold almost flat, making it ideal as a backup mask inside a BCD or thigh pocket.

  • Low Volume for Easy Clearing: Bringing the lens closer to your eyes reduces the air cavity inside, requiring less exhaled air to equalize or clear if water enters.

  • Comfortable Seal: The flexible skirt-mounted buckles absorb strap tension and adapt naturally to facial movements without pulling on the mask frame.

  Tips & Tricks for Prep, Fit & Care

  Initial Pre-Dive Scrub (Crucial Step)

  • Remove Factory Film: Like all new dive masks, the F-Dual arrives with a thin silicone layer deposited on the inside of the lens from the manufacturing process.

  • Cleaning Method: Apply a small dab of non-gel white toothpaste or a specialized mask prep (such as Sea Buff) to the inside of the dry lens. Rub thoroughly with your thumb for 2 minutes, then rinse with fresh water. Repeat twice before your first dive to prevent persistent fogging.

  Checking for Proper Fit

  • Inhale Seal Test: Place the mask against your face without putting the strap over your head. Inhale gently through your nose. If the mask stays firmly suctioned to your face without air leaking in, you have a proper seal.

  • Avoid Over-Tightening: Frameless masks rely on the soft silicone skirt for sealing, not heavy strap tension. Pulling the strap too tight distorts the skirt and actually causes leaks at the temples.

  Emergency Backup Pocket Storage

  • If carrying the F-Dual as a backup mask in your BCD or wetsuit thigh pocket, place it inside a soft neoprene mask bag. This protects the silicone skirt from bending permanently against hard objects and prevents metal clips from scratching the lens.

  Post-Dive Maintenance

  • Freshwater Soak: Rinse thoroughly in fresh, lukewarm water after every dive to flush salt crystals out of the buckle ratchets.

  • Drying: Allow it to air-dry in the shade. Keep it away from direct sunlight, which can discolor liquid silicone and degrade its elasticity over time.