Hestra Heated Gloves & Mittens Include: 1 Pair Premium Hestra Heated Gloves/Mittens 2 Rechargeable 3.7V Lithium-Ion Battery Packs (one for each glove) Manufacturer Warranty Instructions Heated liner mitten allows you to turn your existing Hestra gloves into electrically heated mittens. Features heated coils embedded on the backhand for cold winter days. The temperature can be adjusted in three steps depending on the weather. May for instance be worn with these mittens: 30571 Army Leather Heli Ski Mitt 35161 Army Leather Extreme Mitt 35111 Pull Over Mitt 30481 Narvik Wool Terry Mitt Important Should be worn as a liner with a shell glove for cover and protection of the electric components. The electronic components in this glove may interfere with avalanche transceivers. Features: Outer Material:Windproof, waterproof and breathable ripstop/polyamide fabric Insulation:Fiberfill An insulating material made from polyester fiber. Lining:Brushed polyester Durable lining which is brushed for a softer feeling and containing more air for better insulation. Integrated heating loops Rechargeable/replaceable batteries USB Charger Watertight zipper Hestra Heated Gloves & Mittens Include: 1 Pair Premium Hestra Heated Gloves/Mittens 2 Rechargeable 3.7V Lithium-Ion Battery Packs (one for each glove) Manufacturer Warranty Instructions