Features:- Made of high-quality polyester 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.- 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.- To stimulate acupuncture points. Daily use any time of day. Wash under running warm water without detergents.- Great for outdoor activities, skiing, snowboarding, hiking, hockey, and other sports.- Package content: 1 Pair x Self-heating SocksSpecifications:- Type: Tourmaline socks- Effect: Anti-fatigue- Material: polyester cotton,TourmalineNotes:1. Manual measuring, please allow 1 ~ 3mm error,thank you.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.