The PATAGONIA Men's R1 Lite Yulex Front Zip Wetsuitismade of 85% natural rubber/15% synthetic rubber by polymer content. Replacing a petroleum-based material with a plant-based one, they offer the same warmth and performance attributes as conventional stretch neoprene while reducing CO2 emissions by up to ~80% in the manufacturing process. Derived from sources that are Forest Stewardship Council certified by the Rainforest Alliance,they blend the natural rubber with chlorine-free synthetic rubber to increase ozone- and UV-resistance and meetPatagonia'srigorous standards for strength, stretch and durability. With an anatomical, performance-focused design that maximizes comfort and flexibility while minimizing weight, the superlight R1 Lite Yulex Front-Zip Full Suit is 2mm with a high-stretch, fast-drying 100% recycled polyester lining; the face fabric is 88% recycled polyester/12% spandex. The floating front-zip features a corrosion-proof zipper and asymmetrical flap for better seal, stretch and range of motion through the chest and shoulders. Easy-access key loop included Salmi zipper is fully replaceable to extend the suits lifespan All seams have flatlock construction for next-to-skin comfort Suggested water temperatures: 65–75 F/18–23 C