Black Diamond Mercury Mitts Cold Weather Mittens Shell: 92% Nylon/8% Spandex, 100% Goat Skin Palm, Lining: 100% Polyester. Imported 100% waterproof Dry insert stays with removable liner Lightweight, abrasion-resistant, Pretext Shield shell with 4-way stretch Removable liner is insulated with combination 340 g Prim aloft Gold and high-loft fleece