The ActionHeat™ battery heated socks are the perfect blend of quality and comfort. ActionHeat ™ battery heated apparel utilizes innovative technology designed to warm the core body temperature. These revolutionary garments feature built-in heating panels and are made with ActionFlex™ material that provides lightweight warmth, comfort and versatility. ActionHeat™ heated garments use FAR infrared heating and ActionWave™ heat reflective technology to deliver hours of heat and comfort. ActionHeat™ allows you to stay warming and enjoy outdoor winter activities longer than ever before ActionHeat™ Strategically Placed Heating Panels Use Ultra-Fine Fibers to Provide Extreme Heating Performance ActionWarmth™ Fabric Provides Maximum Insulations and Fit ActionHeat™ Heated Socks Allow You to Stay Warmer & Enjoy Outdoor Winter Activities Longer Than Ever Before Unisex Fit Heats 10+ Hours Material Technology Material Content: 50% Wool, 48.5% Cotton & 1.5% Lycra ActionWarmth™ Heat Trapping Fabric, Provides Lightweight Warmth, Comfort, and Versatility Ultra-Fine Heating Panels Strategically Placed for Maximum Warmth. Outdoor: Walking The Dog Shoveling The Snow Hiking/Camping Motorcycle Home Improvement Work: Contractors Postal Workers Factory Workers All Outdoor Jobs Sports: Snow Sports Hunting & Fishing Running & Cycling Mountain Sports Events: Parades Festivals Sporting Events Includes: (2) ActionHeat™ Wool Blend Socks (2) 3.7 Volt 2.2AH Lithium-Polymer Rechargeable Batteries (1) Duel Battery Charger