The 12 Hour Heated Socks.

Even in the most bitter cold, these heated wool and Thermostat socks provide soothing warmth. Thermostat is made from hollow-core fibers that trap air while moving moisture away from skin. A battery-powered heating element in the padded area of each toe has low and high settings and won't overheat. The low-amperage element is so thin as to be undetectable. Socks run 12 hours on low and 10 hours on high setting. Gray. Requires two D batteries. Made of 40% Wool/40% Acrylic/20% Polyester. Made in the U.S. Unisex sizes M (Women's 5-9, Men's 4-6), L (Women's 9-12, Men's 6-10), or XL (Women's 10-12, Men's 10-12). (9 oz.)