Designed for support and comfort following trauma or post-operative procedure. Lightweight design and pre-shaped ergonomic frame help to modify the level of pressure on the injury at both the malleoli and lower leg.. Soft nylon/foam liner has an integrated pump design making the pneumatic liner simple to inflate and adjust.. Small fits those who wear men's shoes, size 4½ – 5 or women's shoes, size 6 – 8..