The Men's Patagonia Yulex Regulator Lite Front-Zip Long-Sleeved Spring 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 being FSC 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 using water-based, solvent-free AquaA glue. The suit includes a floating, asymmetrical front zip with a noncorroding Riri zipper that enhances sealing and extends the lifespan of the wetsuit, with the added benefit of being repairable or replaceable. Seams are triple-glued and blindstitched for durability, with internal spot-taping in high-stress areas, and an easy-access key loop is included for added convenience.