Fit & Design: One Size Weather resistant softshell & cozy fleece lining provides warmth, comfort, and versatility Strategically placed heating elements use ultra-fine fibers for optimal heating performance An integrated heating system located on the back of the hand Heating panels encapsulated with a thermal seal provides additional durability & moisture protection Adjustable gauntlet strap Technology: Weather-resistant fleece lined softshell A layer of advanced Thinsulate insulation A thermal seal provides the heating system with durability & moisture protection Additional Details: Two ActionHeat Heated Gloves Two Power packs (Batteries Not Included) Heating time: high (red) - 120F 5+ hours