For 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: 38°–48° F/3°–9° C. Made in a Fair Trade Certified™ factory. The R4® Yulex® Regulator® Three-Finger Mitts is fully backed by our Ironclad Guarantee and you can find it on Patagonia.com. | Patagonia R4® Yulex® Regulator® Three-Finger Wetsuit Mitts in Black, Large