Back on Track Socks You will want to try these socks if you suffer from foot problems or if you just like warm feet. These socks are constructed out of the unique Welltex fabric that is infused with a ceramic powder which reflect your natural body warmth and create soothing far infrared thermal warmth. It is recommended to wear these Back On Track Socks during the day to get used to the warmth that they reflect before you decide to try them while sleeping. Not to be compared with magnetic therapy. Features: Welltex fabric infused with ceramic powder Improves circulation, eases pain and reduces swelling Ideal for people with Diabetes Sold as a pair Specifications: Color: Black Care: Machine washable up to 86F or 30C. Use normal detergents that do not contain bleach or fabric softeners. Air dry only, do not tumble dry.