●1 Made of high-quality polyester cotton with the characteristics of soft and comfortable, has a long life. ●2 The bottom of socks has Tourmaline design which can self-heating to warm and your feet in cold weather. ●3 Tourmaline socks relieve leg fatigue, pain, regulate the nervous system, self-heating, remove moisture and stop odor remove swelling of the legs and feet peeling of the skin, produce a static foot massage, regulate blood flow. ●4 The perfect tool for legs with varicose veins, as well as in renal failure. ●5 Good therapy for the ankles and feet when frostbite.