Self-heating Comfortable Elastic And Durable Massage Warm And Cold-proof CottonFeatures: soft, not easy to damage the skin.Made of cotton fiber. They are soft, absorbent, quick-drying, breathable and elastic.Combined with the ergonomic design, the winter warm can be heated evenly and the temperature is stable, which can stimulate the blood circulation of the feet, so that the feet are no longer cold and stiff in winter.Great for outdoor activities: skiing, snowboarding, hiking and other sports.Insulation materials can provide you with safe to keep your feet warm and comfortable in the cold winter.Product Description:Size23x8cmMaterial: CottonPackage Contents:1 pair of