The AirSport Ankle Brace incorporates clinically proven Air-Stirrup® Ankle Brace features, such as a semi-rigid shell and aircells, to provide comfort and support. Additional compression and stabilization is provided by ATF (anterior talofibular) cross strap and integral forefoot and shin wraps. The unique “step-in” design (toes first inserted into the back of the brace) and automatic heel adjustment make the AirSport extremely fast and easy to put on, just: Step In, Strap Up, and Go! Foam-filled aircell that cushions and supports the ankle. Semi-rigid encased shell offers proven Air-Stirrup support. Coated fabric for durability, ATF cross-strap for ankle stabilization Integral forefoot and shin wraps for support. Automatic heel width adjustment for easy application.