Backrest Wideback Obusforme Black 3 wider and 1 taller than the Lowback Backrest Support for people with broader backs and builds. Male size 44 and up female size 18 and over * Patented polycarbonate S-Shaped frame conforms and supports laterally and horizontally the natural contours of the back * 22 1/2 x 19 x 6 1/2 * Includes a patented removable and adjustable lumbar pad. *