The Captain Elastic Ankle Support provides firm support and compression to help relieve stiffness and soreness associated with minor sprains and strains as well as arthritic pain. The contoured fit, open-heel design and breathable elastic ensure a cool and comfortable fit during all of your athletic activities. The Captain Elastic Ankle Support is made with high quality, long-life elastic to ensure the same level of support and compression every use. Benefits: Provides firm support and compression to relieve stiffness and soreness. Contoured fit, open-heel design and breathable elastic ensures a cool and comfortable fit. Made with high quality, long-life elastic. Sizes: Small/Medium: up to 10" Large/X-Large: 10" and over (Measure the circumference of your ankle directly over the joint for sizing.)