sherpa wheelchair back cushion adds sherpa comfort and support on the go. Polyurethane foam cushion is sized just right to fit a wheelchair, adding firm support for the lower and middle back. Plush sherpa zip cover adds cozy warmth and removes for easy washing. Portable, versatile back cushion also is great for a chair or vehicle seat. Cushioned support for a wheelchair and more.Elastic strap for a secure fit.Wheelchair cushion measures 20"W x 18 1/2"H x 2 1/2"D.100 polyurethane foam cushion100 polyester sherpa cover.Machine wash cover in warm water; tumble dry low.EasyComforts