NOTE: These are REPLACEMENT heated socks only. They do not include batteries or chargers.Introducing the new ActionHeat 2.0 Socks! Now featuring an easy to use remote and extended heating area!The ActionHeat 3.7V battery heated socks are the perfect blend of quality and comfort. The Rechargeable ActionHeat socks reach a maximum temperature of 140F and can last up to 7 hours. Features:Built-In heating panels strategically placed on the top of the toes use advanced ultra-fine fibers to provide superior heating performanceColors Available: BlackMachine Washable using provided mesh wash bag only (gentle cycle) Heats 7+ HoursUnisex FitSizes Available: S/M, L/XL, XXLEstimated Heating Times:High (Red): 140F – 4+ HoursMedium (Orange): 120F - 6+ HoursLow (Green): 100F – 7+ HoursMaterial Contents:Material Content: 44% Acrylic, 18% Polyester, 16% Wool, 14% Nylon, 7% Cotton & 1% SpandexUltra-fine carbon fiber heating panels.Color:Grey with black accentsIncludes:(2) ActionHeat Wool Blend Socks ONLY - NO BATTERIES INCLUDED