2 Pair Self Heating Warm Pain Relief Unisex Features: Made of polyester cotton with the characteristics of soft and comfortable, has a long life. The bottom of has design which can self-heating to warm and your feet in cold weather. relieve leg fatigue, pain, the nervous system, self-heating, and stop odor swelling of the legs and feet peeling of the , produce a foot massage,. The tool for legs with varicose veins, as well as in renal failure. Good for the ankles and feet when frostbite. To stimulate acupuncture points. Daily use any of day. Wash under running warm water without detergents. Great for outdoor activities: skiing, snowboarding, hiking and other sports. Specifications: Material:Tourmaline,Polyester cotton Item Type:Braces & Supports Color:White,red,black Type:Tourmaline Effect:Anti-fatigue Massage Socks:Health Massage Sock:Self-heating Contains: 2 x pair of self-heating