Back On Track Therapuetic Western Saddle pad is designed to use under your regular saddle pad to help your horses back muscles loosen, relax and warm up. the ceramic powder is melted into the fabric to increase blood flow relieves muscle tension and pain. Great for horses with cold or sore backs. The measurements are 29 inches across the spine with a 16 inch drop at the withers, 14 at the center and 15 inch drop at the rear, contoured, color black. Great comfort for your horse.