The Men's Patagonia Yulex Regulator Lite Short John Wetsuit is formfitting and made from a flexible blend of 85% Yulex natural rubber and 15% chlorine-free synthetic rubber by polymer content, with the natural rubber certified by Preferred by Nature. It features stretchy, solution-dyed linings with an interior of 100% recycled nylon and an exterior of 83% recycled nylon and 17% spandex, all laminated with water-based, solvent-free AquaA glue. The hook-and-loop shoulder closure provides easy entry and exit, while an internal key loop adds practical functionality. Seams are sewn with flatlock construction to ensure maximum durability and comfort for warm-water performance.