What is the Physio Room Air Walker (Ankle & Foot)? Featuring inflatable air cells to reduce foot & ankle swelling, the Physio Room.com Air Walker is a short walking brace that protects foot & ankle injuries, while allowing you to move around. Wearing the Air Walker following a sprained ankle, broken foot, lower leg or ankle fracture reduces swelling & speeds up recovery. When can I use it? Following a foot injury or ankle injury such as a sprained ankle Ankle fracture Broken Metatarsal Fibula fracture Lisfranc joint injury Cuboid fracture Talus fracture Which size do I need? Measure the length of the foot. Shoe Size Conversion Chart Small: 25cm-26cm (9"-10")UK Shoe Size 2-5 Medium: 28cm-29cm (11"-12") UK Shoe Size 5-8 Large: 32cm-33cm (12"-13") UK Shoe Size 8-11 Extra Large: 37cm-38cm (14"-15") UK Shoe Size 11-14 How does it work? The Physio Room.com Air Walker features a lightweight plastic shell that provides immobilisation & protection like a short plaster cast, but is much more comfortable & convenient. Using the integrated pump, air cells inside the walker can be inflated, according to need, thus providing compression for the swollen ankle, which helps to reduce swelling & speed up rehabilitation.