Donut shape high density, molded foam conforms to body contours to reduce pressure to sensitive areas. Aids in the relief of post-natal discomfort, post-op pain, hemorrhoids and bruised coccyx. Removable, machine washable black cover. After opening foam will decompress to its full size in less than one minute. Dimensions: 16 1/2" x 12 1/2" x 2 3/4". Perfect for use at home, office or in the car!