EquiFit's GelCompression Tendon Boots are uniquely designed to provide cold therapy along with compression, helping reduce your horse's swelling and inflammation. Unlike other similar products that can be bulky and cumbersome, these boots are lightweight, simple to wash, and easy to store. The GelPaks velcro into the outer shell of the boot while the removable hand pump pushes air into the shell for compression therapy. Unlike many other ice boots, the GelPaks remain flexible when frozen to ensure a comfortable fit around the lower leg. GelPaks can also be microwaved to apply heat therapy to the lower leg.