This is a rubber donut cushion. - The cover is removable and washable. It can be used in various situations such as long hours of desk work, illnesses, postpartum care, and at home. I bought this new here, but the size didn't fit, so I'm selling it. Used a few times, and the cover has been washed. I plan to ship it without the box. If you need the box, I will fold it and ship it, so please let me know.