Breathable mesh fabric with soft cotton lining encapsulates polystyrene bead fill to surround the heel, foot, and elbow joints with a protective cushion of air. Prevents decubitii, and highly effective in the treatment stages of existing wounds. Insulates the foot and maintains body warmth to aid in circulation. Zippered opening allows amount of fill to be adjusted if necessary for a custom, comfortable fit. Sold in pairs, fully machine washable. Latex free.