Ossur Equalizer Air Walkers are great low cost walking aids! They are constructed with a pneumatic system that will increase the stability and lower the pain and swelling during walking. You can adjust the air to fit your compression and size needs. It will also adjust to the swelling patterns that come up during rehab. This walking aid is designed to be worn on right or left foot and available in either High or Low Profile model. Comes in 5 great sizes: X-Small, Small, Medium, Large, or X-Large.