Lavacore is a technically advanced fabric, constructed and engineered exclusively for water sports requiring the ultimate in thermal control and superior comfort. Thermal and neutral buoyancy properties create the ideal garment - under a neoprene wetsuit for added insulation and warmth or as a stand-alone exposure protection garment. The unique design of Lavacore materials eliminates constriction and allows for extreme movement and flexibility while regulating your core warmth.

Lavacore shirts are made with an exclusive Polytherm Tri-Laminate. Ideal for use as a primary exposure suit in warmer waters or as a supplemental undergarment in colder waters. Windproof and breathable providing anti-wind chill properties while also drawing moisture away from the body on the surface, ensuring warmth in cold conditions. For the ultimate in warmth Lavacore's Merino Laminate lined garments are super soft yet durable. Moisture wicking and anti-bacterial, the Merino fleece inner minimizes odor and keeps you warm above and below the surface.

Shirt is DWR: Durable Water Repellant has flat seam construction throughout for stretch and comfort. Lavacore is neutrally buoyant so you won't need to add weight to your weight system compromising your weight comfort zone. Full gusset incorporated into the underarms offer exceptional arm movement and stretch and all seams are overlapped during flat-lock sewing to ensure maximum water integrity and strength. Lavacore provides SPF 50+ sun protection and is designed and developed with your guarantee of quality. Men's long sleeve shirt has thumb loops, waist drawstring closure with barrel lock to prevent suit ride up when layering under exposure suit and is hypoallergenic. Shirt is available in multiple sizes.

Merino Wool Inner Lining: Integrates a natural Merino wool inner fleece layer that increases thermal insulation, feels soft against the skin, and naturally resists odor-causing bacteria during extended multi-day trips.

3-Layer Technical Tri-Laminate: Features an outer nylon layer with a Durable Water Repellent (DWR) finish, a breathable windproof polyurethane middle membrane, and the high-warmth Merino wool inner layer.

Neutrally Buoyant: Like standard Lavacore garments, the material does not compress at depth or add positive buoyancy, eliminating the need to adjust diving ballast weight.

Superior Thermal Performance: Delivers thermal insulation exceeding a standard 3mm neoprene top while maintaining lower bulk, greater flexibility, and zero suit compression squeeze at depth.

4-Way Stretch & Flatlock Construction: Flexible 4-way stretch material with flat-stitched seams ensures high mobility across the shoulders and chest while preventing seam chafing.

UPF 50+ Sun & Wind Protection: Provides a windproof barrier on surface intervals and shields the torso and arms from harmful solar radiation.