This specific item appears to be from H2O’s vintage or past-season collections (likely mid-2000s to early 2010s). As of the latest retail checks, it is not a current mass-market offering but can be found via resale platforms (Poshmark, Depop, eBay, Mercari).
Scuba fabric (neoprene-like) is known for heat retention. Adding laser-cut perforations under the arms or along the spine can improve comfort. h2ogems scuba top
Transition from the water to the shore by throwing on a pair of linen trousers or a sarong. The sleek, structured look of the scuba material mimics high-end "athleisure" wear. Care and Maintenance Product Report: H2O Gems Scuba Top Note: This
: When submerged, the water trapped in these vents still provides a thermal layer, but allows the skin to "breathe" better when dry. Suggested Technical Specs Material Requirement Quick-Drain Cuffs Mesh-insert panels Prevents water pooling in sleeves upon exit. Bungee Key Loop Reinforced elastic Securely holds locker keys or small tools. Thumb Loops Extended cuff fabric Keeps sleeves in place under a thicker wetsuit. How to make a top from scuba fabric - Sewing Bee Fabrics For the Trendsetter: Transition from the water to