One size. Helps prevent injury. Adjustable, comfortable support for weak muscles and joints. Retains heat for increases circulation. Neoprene blend material retains body heat for increases circulation. Hook and loop fastener for easy application and adjustment. Designed for proper fit with minimal slipping and bunching. Permits full range of movement while providing comfortable support and protection against bumps and blows. Helps keep muscles pliable, reducing susceptibility to injury. ACE Brand sports medicine products are designed to provide you with the optimal support you need while assuring proper fit and comfort. ACE Brand offers a full line of braces, bandages, sports tape and hot & cold therapy products to help treat and support weak muscles, tendons and ligaments and to help reduce the chance of injury recurrence. The ACE trademark is your assurance of superior quality, support and comfort. Mad in U.S.A.