The Women's Patagonia Yulex Regulator Lite Front-Zip Long-Sleeved Spring Wetsuit is formfitting and crafted 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 made of 100% recycled nylon and an exterior composed of 83% recycled nylon and 17% spandex. All linings are laminated using water-based, solvent-free AquaA glue, offering comfort, durability, and environmentally conscious performance for warm-water activities.