The Aircast, AirSelect Short walker boot is made from a strong and durable Polypropylene shell in combination with an inner construction of; Nylon, Polyurethane and Polyester for optimal comfort and performance. The built-in SoftStrike technology helps absorb and dissipate any shock to the foot area which can prove useful for fracture type injuries. The walker boot has also been lab tested with a rocker sole to allow freedom of movement and ensure normal walking gait is maintained as close as possible. The Airselect Short Walker Boot can be used for; Ankle Sprains Stress Fractures of the foot Soft tissue injuries Severe metatarsal fractures Post bunionectomy Please refer to our size guide for information on sizing Size Men\'s UK Shoe Size Women\'s UK Shoe Size EU Shoe Size Extra Small Up to size 3 Up to size 3 Up to size 35 Small Sizes 3 to 6 Sizes 3 to 6 Sizes 35 - 39 Medium Sizes 6 to 9 Sizes 6 to 9 Sizes 39 - 42 Large Sizes 9 to 12 Sizes 9 to 13 Sizes 42 - 47 Extra Large Size 12 and above Size 13 and above Size 47 and above