Controls plantar flexion. Synthetic removable, washable sheepskin liner. Heel is suspended for maximum pressure relief. Extended toe support keeps blankets off toes. Extended lateral support can stabilize leg rotation. #503170-Sm 3x9.5 #503171-Md 4x11 #503172-Lg 5x12.5 #503174-Extended Toe w/Lateral Support 4x11-Liner replacement codes #503180-S #503181-M #503182-L Latex Free UNSPSC#4221706