MaxTrax Air Walkers have all the features of the standard walkers plus the benefit of a pneumatic liner. The liner provides support and compression to help promote fracture healing. Adjustable air chambers accommodate changes in edema and maximize patient compliance. This boot helps to increase stability and reduce pain and edema following trauma or post-operative procedures. A cost-effective option to serial casting. Size: Large, Men's 10.5 - 13.5, Women's 11.5 - 14. 5.