Air-Stirrup Air Ankle Support One Size Fits Most Hook and Loop Closure Left or Right Foot - EachAbout Air Stirrup Walker Boot, One Size Fits Most (1 Unit) Universal semi rigid shell design with Duplex air cell technology to reduce swelling and pain and encourage earlier ambulation for functional management of ankle sprains Anatomically designed for acute ankle injury, post operative use, chronic instability and ankle sprains grade I, II and III One size fits most: 9 inch height Description: Air Ankle Support Air Stirrup One Size Fits Most Hook