The Alpenheat Heated pants is your new best friend this winter. These heated underpants are developed to keep you warm in cold weather and are ideal for wearing under ski pants, trousers, jeans, etc. The special heating elements in the knee and kidney area are close to the skin, allowing the heat to transfer perfectly to the body. The heat duration of 2 to 5 hours per battery will keep you warm for an entire fishing day. The battery can also be recharged in just 4 hours which makes it extremely practical. A must-have for winter fishing and other outdoor activities!