The Aircast Air-Stirrup Universe Ankle Support Brace is commonly worn immediately after an ankle injury and throughout recovery. It's intended to prevent or treat acute ankle injuries, chronic instability, post-operative use and ankle sprains grade I, II, and III. Featuring semi-rigid, anatomically designed shells which help stabilize and protect the ankle. These shells are lined with patented Duplex air cells that enhance circulation and reduce swelling and edema. The air cells are pre-inflated and provide pulsating compression while walking, helping accelerate rehabilitation. This ankle support brace has a low-profile structure, allowing for minimal bulk while wearing shoes. It resists inversion more than taping, yet normal flexion is virtually unrestricted. Universal fit allows the Aircast Air-Stirrup Universe Ankle Support Brace to be worn on either the left or right foot.