Drive Medical, Ring Cushion drive 16-1/2 W X 12-1/2 D X 3-1/2 H Inch Foam, Count of 1Product Description Specially designed to reduce pressure on sensitive areas when sitting for extended periods Unique shape offers relief of coccyx (tail bone) pain, hemorrhoids and post surgery discomfort Donut shape comfortably conforms to body contours Cushion automatically expands to full size when removed from packaging Comfortable and durable foam construction Removable, machine washable cover 1 Year Limited Warranty Product Benefits Ingredients