Hot Gloves Heated Hand Warming Ski and Work Glove Liners Hydrolyte synthetic body/Cabretta leather palm/Lycra inserts Imported Enhanced performance design combines a cabretta palm, hydrolyte synthetic body and spandex microfit inserts for maximum dexterity Each glove liner pair comes with 1 pair of HotHands2 Hand Warmers The HotHands2 packs are inserted into a special compartment sewn into the backhand portion of the glove and held in place with a Velcro clasp Greatly improves the overall heat effectiveness for ski gloves and mittens HotHands2 provide up to 10 hours of safe, comfortable heat -- perfect for a full day of skiing or a long workday Enhanced performance design combines a cabretta palm, hydrolyte synthetic body and spandex microfit inserts for maximum dexterity