Filled with fluffy spun fiber. May be washed and dried at temperatures that do not exceed 180 degrees F (82 degrees C). Filled with fluffy spun fiber. Covered with low-friction brushed polyester fabric to reduce skin shear. Cover wicks away moisture to eliminate skin-damaging perspiration. Comfortable, extra-wide cloth strap will not irritate skin. Velcro closure keeps heel cushion in place. Reusable and launderable. Meets California 117B flammability standards. New Cozy Cloth cover for reduced friction and shear.