The KRUUSE Rehab Hock Protectors are manufactured of Neoprene and are waterproof. Everything on the inside of the joint protector remains dry even under extremely poor weather conditions. The hock protector is placed with the tip of the hock out through the opening in the protector and then stretched around the leg above and under the joint. The hock protector can be used before and after surgery, chronic arthritis ie Osteoarthritis, OCD, Ligament Injuries, Arthritis, ED and other assessments.