Molded memory foam with removable coccyx / donut pad. Removable coccyx pad relieves the coccyx area due to injury, surgery, hemorrhoids. Constructed to guide the pelvis in a more natural angle without compromising your natural spinal curves. The contour ring seat is perfect for a long commute, office or any seating surface that needs more comfort and support. Handle for carrying everywhere you go. Fits most Chairs and Car seats. Soft Plush Removable Cover.