The PRO H21 Thoroughbred Support (US Patent #5,871,458) fills the gap between the traditional bulky sports medicine boots that provide support and splint boots that provide protection but no support. Constructed of orthopedic grade neoprene in the patented PRO design. The equal length fetlock support strap allows the user to adjust the angle and amount of support to fit the horse. In addition the H21 is designed to fit the thoroughbred. These supports have been shown to reduce overuse injuries common in training racehorses. They provide more support than traditional polo wraps and are more economical. The supports are machine washable. Sold in pairs. Available in small, medium and large in a variety of colors. Please visit our website at http://www.proorthopedic.com/ for size charts, color options and measuring instructions.