Össur® Formfit® Air Walker Patented pneumatic system designed to increase stability while decreasing pain and swelling. The intuitive pump and clearly marked decompression valve make air/pressure adjustments easy. Provides immobilization for patients suffering from soft tissue injury; grades 2 & 3 strains and sprains; and stable fractures. Shock absorbing sole reduces impact during heel strike. Rocker bottom promotes a stable, natural gate. Breathable, seamless liner.