The Muddy Nucleus Heated Socks keep your toes warm during all-day ice fishing for walleye and perch, late-season deer hunts, and cold-weather waterfowl mornings when frozen ground pulls heat fast. Each Brown Clay sock features a heating element across the toes powered by its own included 3,500mAh battery, delivering up to 8 hours on Low, 5 hours on Medium, and 3.5 hours on High. Silent, easy-access power buttons and battery pockets at the top of each sock allow quick heat adjustments without removing boots. The performance blend of 40% Merino wool, 24% acrylic, 16% nylon, 17% polyester, and 3% spandex manages moisture, adds durability, and maintains stretch for long days in insulated boots. The included charging cord restores both batteries to full capacity in as little as three hours, keeping you ready for the next cold outing.Color: Brown ClayConstructed of 40% Merino Wool, 24% Acrylic, 16% Nylon, 17% Polyester, 3% SpandexOne toe heating element per sock powered by included 3,500mAh batteriesBatteries recharge to full capacity in as little as three hours via charging cord (included)Three heat settings keep you warm in any conditions:Low (8h)Medium (5h)High (3.5h)Manufacturer's limited warranty