A warm and durable neoprene-free wetsuit, the R4 Yulex Front-Zip Hooded Full Suit is made of 85% Yulex natural rubber/15% synthetic rubber by polymer content; the natural rubber is derived from sources that are Forest Stewardship Council certified by the Rainforest Alliance. Made in a Fair Trade Certified facility. Suggested water temperatures: 38-48 F/3-9 C.