This therapeutic Back Pad (size - 3' x 4') uses 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. This 3 x 4 Back Pad helps to warm up your horses back before exercise, loosening up the muscles. A Velcro strip detaches and may be sewn into an existing blanket or may be used with a surcingle. See and feel the results for yourself with horses that are experiencing a sore back or cold back. Material is 100% polypropylene infused with Back on Track's revolutionary new ceramic infused fiber. Back on Track products are not to be compared with magnetic therapy. Our form of therapy works with your horses own body warmth.