Arcteryx Fission Mitten Fortius 1.0 exterior combined with a Gore-Tex waterproof / breathable insert Leather reinforced palm and fingers for increased abrasion resistance and grip 133 g PrimaLoft Silver Insulation (back of hand) + 100 g PrimaLoft Silver Insulation Hi-Loft (back of hand) 100 g PrimaLoft Gold Insulation Eco with Grip Control (palm and fingers) bonded to shell and lining for better grip and dexterity Pull to open / pull to close gauntlet is easy to use