The Mueller ATF 3 Ankle Brace will help prevent you from rolling your ankle and was designed to be lighter, less bulky, more comfortable, and easier to get on and off. Inversion sprains (rolled ankle) account for approximately 85% of all ankle sprains. The ATF 3 Ankle Brace features a patented internal strapping system that self-adjusts to support your Anterior Talofibular Ligament. This system helps protect against 'rolling the ankle' without restricting jumping, speed or agility. Hand wash in cold water with mild detergent. Do not use bleach or fabric softener. Rinse thoroughly and air dry. Patented Internal Strapping auto-adjusts to help prevent you from rolling your ankle Faster lacing provides more comfort across the top of your foot Re-engineered stabilizers provide firm support while allowing a full range of movement Comfort mesh vented fabric helps manage heat and moisture Please Note: Measurements based on shoe size. If between sizes, order the smaller size.