Solid Back Insert Wheelchair Cushion 18 x16 x1.25 w Strap Default Major Category Used in similar applications to MSHQ 1594XL Used in similar applications to the Mats however Reel material is thinner more flexible and can be cut to size as required * Cut small circles from the material to put between plates to stop rattling and sliding or use to line shelves * Medium * Has a fully adjustable internal buttress which ensures correct positioning and control of patella movement * Allows vertical tracking of the patella during vertical flexion extension * Assists in the treatment of patella problems including instability pain and subluxation (looseness) SOLID SEAT BACK * 18 W x 16 D x 1 1 2 * Custom and bariatric sizes are available * Used to properly align the body as well as to eliminate the sagging effect found in standard sling seat wheelchair upholstery * Safety straps secure the solid back to the wheelchair * Cushion uses medium density foam and is covered using waterproof black leatherette cover