The Women's Patagonia Yulex Regulator Lite Long-Sleeved Spring Jane 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 made 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 for added comfort, durability, and reduced environmental impact, making it ideal for warm-water performance.