Note: The sock surface with glue dots needs to be worn against the skin of the sole of the foot. How it works: When exercising, the glue points rub the acupoints on the soles of the feet to generate heat. Description Material: Self-heating, Polyester cotton Weight: 40g Size: EU35-43/ US 5-9.5 Type: Self-heating socks Effect: Anti-fatigue Massage Socks: Health Care Socks Self-heating Massage Sock: Self-heating Magnetic Socks   Features: 1. Made of high-quality polyester cotton with the characteristics of soft and comfortable, has a long life. 2. The bottom of socks has Self-heating design which can self-heating to warm and relax your feet in cold weather. 3. Self-heatingsocks 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. 6. To stimulate acupuncture points. Daily use any time of day. Wash under running warm water without detergents. 7. Great for outdoor activities: skiing, snowboarding, hiking, hockey, and other sports. Note: There may be some subtle differences between the color of the image and the actual project. Thanks to the manual measurement, please allow 1-2mm difference, thank you. Wearing style. The socks with adhesive dots need to be worn against the skin on the bottom of the foot, these are not non-slip socks Package Included: 1 pair of self-heating socks