Cold feet, handled. These rechargeable heated socks wrap your forefoot and toes in steady warmth with 3 heat settings powered by a 5000mAh rechargeable battery — up to 8-10 hours per charge. A soft, breathable cotton-spandex blend hides the heating elements so they fit comfortably in boots, waders, or ski gear. Machine-washable, high-calf coverage, with side pockets that hold the batteries snug. Built for hunting blinds, ice fishing, skiing, and winter camping.