Our 35 Degrees Aluminized Fibers Heating Socks contain special braided aluminized fiber. It can improve blood circulation, relieve leg swelling, eliminate varicose veins, and help maintain body temperature. Wearing it regularly will help your legs get natural relaxation and comfort. Effective use of body heat, minimize sweat and moisture, stay warm and comfortable in the weather below 35 degrees, ideal for winter outdoor activities. The way to use it is very simple: wear warm socks, you can put on ordinary socks and shoes as needed. Promotes blood circulation, eliminates swelling and varicose veins, and helps maintain body heat.