We could say that these heated mitts are ideal for hunting, hiking, fishing, snowmobiling, skiing, and spectator sports, but let's face it, they are simply ideal for Canadian winters. Battery heated, the heating element is located across the palm to keep you warm during cold days. Effective for 5+ hours depending on battery quality, they use 3 x AA regular or rechargeable batteries per mitten (not included). The battery pack is located in the cuff and has a push-button for easy on/off control. They are water resistant with a poplin nylon exterior and a Thinsulate® lined, polyester, TPU-membrane interior.