Experience unparalleled comfort with this innovative half-cylinder padded design, allowing for infinite positioning to suit your individual needs. The hypoallergenic medical-grade foam evenly distributes weight, providing optimal support & comfort for extended sitting periods. The durable nylon cover features a nonslip tread, ensuring stability & safety during use. Plus, it's machine washable, making it easy to maintain. Whether you're using it at home, in the office, or for therapeutic purposes, this product offers the perfect combination of comfort, support, & convenience. Width: 17.5"; Height: 6.25"; Depth: 11.5"; Color(s): Black.