Our Knee Boot has a neoprene exterior lined with state-of-the-art fabric which contains polyester thread embedded with a fine ceramic powder. Designed to reflect the horse's own body-warmth, it creates a soothing far infrared thermal heat, which can help alleviate pain associated with inflamed muscles, ligaments, tendons and joints. Used for both injury prevention as well as injury recovery. Back on Track products are not to be compared with magnetic therapy. Our form of therapy works with your horses own body heat. Great to use in combination with the Sore No More liniment or Gelotion.