Designed to offer comfort and positioning for home, office or in the car, Lumbar Cushions from Drive and Mason Medical are made from molded foam and come with a cloth cover with elastic straps. Designed to offer comfort and positioning for home, office or in the car. Features and Benefits Conforms to lumbar curve to support lower back Durable Masonite board secured on back of foam core prevents hammocking in sling-back wheelchairs Memory-foam back cushion provides support, comfort and a tactile curve to improve posture Non-slip vinyl back prevents the cushion from sliding Sealed liner protects foam core from moisture Product Specifications Cover Material: Polyurethane, Vinyl Product Dimensions: 17.00"(L) x 22.00"(W) x 2.50"(H) Warranty: 18 Month Limited About Mason Medical For more than 40 years, Mason Medical has been a leading manufacturer of innerspring mattresses and pressure redistributing therapeutic support surfaces, including low air loss products, alternating pressure and lateral rotation air mattresses, gel overlays, multi-layered foam mattresses, and an extensive line of wheelchair cushions. Mason Medical, a Drive Medical Company, is committed to providing the highest quality products manufactured in the United States and overseas, as well as industry leading customer service and innovation.