Alpha Medical Neoprene Slip-On Ankle Support With Velcro Closure The Alpha Medical Neoprene Slip-On Ankle Support With Velcro Closure is die cut from 1/8″ thick neoprene that is laminated (covered) with a soft soothing nylon skin. The Velcro closure allows for easy application as well as an adjustable fit for the desired level of compression. Neoprene has a warming effect that together with the compression that the ankle support brace offers helps to improve blood flow and reduce edema (swelling) of the ankle. The sturdy material and elastic properties of the Alpha Medical Neoprene Support Ankle Brace makes it ideal for protection during activity as well as a good tool that may help in the treatment of minor ankle injuries. Size Guide Measure just above the ankle bone Small 7″-8″ Medium 8″-9″ Large 9″-10″ X-Large 10″-11″