Product Information: Made of high-quality polyester cotton material, soft and comfortable, not damage the skin. Insulation materials can provide you with safe socks to keep your feet warm and comfortable in the cold winter. Combining with ergonomic design, the winter warm socks can be evenly heated and the temperature is stable To stimulate acupuncture points. Daily use any time of day. The complete geometry is not easily deformed. The bottom of socks has Tourmaline design which can self-heating to warm and your feet in cold weather. Reminder：after receiving the socks, turn the picture display part back on, and the bottom electric shock stone should be attached to the sole of the foot Size：20x12cm/7.9X4.7" Package Include: 1 Pairs Socks