Patagonia R4 Yulex 3 Finger MittsFor reliable warmth in winter conditions, these wetsuit mitts are made from stretchy, 5mm 85% Yulex natural rubber 15% synthetic rubber by polymer content, with 100% external seam sealing and a textured palm for grip. Best for water temperatures: 3848 F 39 C. Fair Trade Certified sewn. Made with Natural Rubber Stretchy 85% Yulex natural rubber 15% synthetic rubber by polymer content; the natural rubber is Forest Stewardship Council certified by the