Features: * Fits the curve of the foot so that the hot spot of the foot is close to the sole skin. It can be used to massage acupuncture points on the feet regulate the nervous system and promote circulation. Combined with ergonomic design winter warm socks are evenly heated and the temperature is stable which can stimulate the circulation of the feet so that the feet are no longer cold and stiff in winter. *The thermal socks are made of high quality cotton fiber. They are soft absorbent quick-drying breathable and stretchy. Insulation provides you with secure socks to keep your feet warm and comfortable in cold winters. * The principle of self-heating at the bottom the heat is mild and it has a warming effect on the feeling of cold feet. *Warm socks design suitable for both men and women normal size. These super stretchy and stretchable heated socks are available in one size for unisex adults. * Heated socks keep your feet warm and comfortable all day in cold weather great for skiing ice fishing hiking keeping rock climbing running dog walking snowboarding motorcycles horseback riding and other indoor/outdoor activities. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material:Cotton Size:2383cm includes: 3PCS * Socks "