The Black Diamond Super Light Mitt is a light weight synthetically insulated mountaineering mitt. 100% waterproof and breathable GORE-TEX with XCR Product Technology insert Pertex 15D ripstop shell 284 g PrimaLoft Kodenshi insulation Sheepskin leather palm with Kevlar stitching for maximum dexterity and compressibility Secure wrist strap and draw-cord gauntlet WARNING: This product can expose you to chemicals includingBisphenol A (BPA) and Nickel, which are known to the State ofCalifornia to cause cancer and birth defects or other reproductiveharm. For more information go to www.P65Warnings.ca.gov. Black Diamond Glove Sizing