The Mercury Mitten is Black Diamond's most versatile and popular year round mitt for skiers, climbers, and alpinists. Remove the liner for summer expeditions, and keep the two together for winter climbs. A BDry insert gives this mitten exceptional waterproof protection, and the removable liner's innovative PrimaLoft Gold synthetic insulation feels and compresses like down yet protects your hand with long lasting water resistance. Pertex Shield also assists with waterproofing as well as providing a four way stretch for freedom of movement. The Mercury also features a goat leather palm for a good grip, Kevlar stitching for durable reinforcement, and a split finger design that give the removable liner more dexterity.