The Back on Track Hock Brace has been designed to fit snugly and securely to this hugely important but often difficult to wrap joint. The Welltex lining is 50% cotton and 50% polyester while the outer is sturdy neoprene and the boot is secured in place with hook and loop straps. Designed to deliver the benefits of reflected infrared where it is most needed, the Hock Brace supports suppleness and flexion and is ideal for horses with hock problems. Choose from a left or right boot, in four sizes. If the Hock Brace slips down on an active horse, bandage a Back on Track pad on the leg below the hock and the boot will stay put during movement.