The tendon boots are made of strong neoprene. The good fit is characteristic of these tendon boots, as they fit snugly against the tendon and fetlock. The tendon boots have a Velcro closure. They can be used preventively to minimize the risk of injury or inflammation. A good alternative to bandaging with an underlay. Available in black and white. Sold per pair in sizes small (H24 x W26), medium (27 x 27), and large (29 x 28). Material Lining: 50% cotton, 50% polyester Outer: neoprene. Washing instructions Can be washed at a maximum of 40 degrees on a moderate cycle. Do not use bleach. Dry at low temperature, do not iron, do not dry clean. Do not use fabric softener.