The cushion comes compressed in a unique compact package and expands to full size when opened. The cushion's cover is also removable and machine-washable for easy care. Specially designed to reduce presure on sensitive areas when sitting for extended periodsUnique shape offers relief of coccyx (tail bone) pain, hemorrhoids, and post-surgery discomfortDonut shape comfortably comforms to body contoursCushion automatically expands to full size when removed from packagingComfortable and durable foam constructionRemovable, machine-washable cover.