The Avalanche X Heated Mitten are packed with a knockout punch of heat thanks to our Zero Layer Heat System that eliminates bulk and optimizes heat transfer. These mittens will surround your fingers and thumb in a cocoon of heat that will have you smiling all day skiing. The rich leather palm helps increase durability so you can enjoy these heated mittens season after season. The waterproof/breathable membrane will also prevent your hands from getting wet while you enjoy the soothing heat. Features: Nylon shell and soft tricot fleece lining with leather palm Waterproof/breathable membrane Heats each side of the hand as well as the thumb Built-in 3 level microprocessor controller to select desired heat output Provides over 150 degrees of soothing heat for 2 hours on the highest setting Includes two 7.4v rechargeable batteries and charger Zero Layer heat system eliminates bulk while providing more efficient heat transfer. Approximate Battery Run Time per Power Level: Red 100% High - 2 hours Blue 66% Med - 3.5 hours Green 33% Low - 5 hours