The ActionHeat Wool 5V Battery Heated Socks provide powerful, targeted warmth for outdoor and indoor cold-weather activities. Designed with built-in heating panels on the soles, these socks deliver consistent heat using advanced ultra-fine fibers while the heat-trapping fabric maximizes warmth and comfort. Rechargeable 5V batteries allow up to 5 hours of adjustable heat, controlled via a touch-button on the sock. Lightweight and flexible, the ActionFlex material ensures a comfortable, versatile fit under boots or shoes. Perfect for hiking, skiing, or simply staying warm at home, these heated socks combine innovative technology with premium materials for lasting performance. WARNING: These socks get hot. Follow instructions and use carefully. NOTE: Recommended to use low or medium settings. Heat Blast should not be used for more than 5 minutes at a time.