The ISO Preferred Walking Boot I (FT36x) is an open toe nonpneumatic foot and ankle brace designed to reduce the time it takes to heal discomfort from soft tissue injuries, post-surgery, grade 2 and 3 sprains, trauma, and rehab. The boot has a soft, cushioned inner liner and outer support uprights. The curved rocker bottom is constructed to promote a natural and normal gait. A closed heel provides additional foot protection. Spacer pads are provided to cover a more sensitive area or achieve a more secure fit. Sizes S to XL. Fits left or right foot.