Arcteryx Lithic Mitten - Women's Palm and fingers are built using burly, highly hydrophobic, N333p-X 3L Gore-Tex fabric with tricot technology and TPU laminated reinforcements Highly breathable N70p Gore-Tex back of the hand TriDex construction for exceptional dexterity and breathability 133 g PrimaLoft Silver Insulation + 100 g PrimaLoft Gold Insulation Eco (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