Features: 100% brand new and high quality Made of high-quality cotton with the characteristics of soft and comfortable, has a long life. The bottom of socks has Tourmaline design which can self-heating to warm and relax your feet in cold weather. The perfect tool for legs with varicose veins, as well as in renal failure. Good therapy for the ankles and feet when frostbite. To stimulate acupuncture points, suitable for daily use any time of day. Wash under running warm water without detergents. Socks relieve leg fatigue, pain, regulate the nervous system, self-heating, remove moisture and stop odor remove swelling of the legs, produce a static foot massage, regulate blood flow. Great for outdoor activities, like skiing, snowboarding, hiking, hockey, and other sports. Package Includes: 1 Pair of Self Heating Socks Specifications: Material: Cotton Color: Black/Red/White Package Weight: approx.40g Size: approx.18x20x8cm/7.08x7.87x3.14in note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you