Back on Track Therapeutic Horse Western Pad, 31 by 30-Inch To be used under your regular saddle pad to help your horse's back muscles loosen, relax and warm up quickly Made of polypropylene and with our state-of-the-art Welltex fabric, which is infused with ceramic powder The pad reflects your horse's natural body warmth and creates a soothing far infrared thermal warmth Tired or sore back muscles experience relief from this soft warmth therapy The gentle warmth increases blood flow, which helps relieve muscle tension and pain; Wonderful for horses with cold or sore backs