Contoured trough provides an added contoured padding to the top and inside face if the wheelchair armrest and includes self-releasing straps that may be used to stabilize the arm position. Cover is made of a soft, water repellent, wipe-clean vinyl and the interchangeable design fits either side armrest. Meets CA #117 flame retardancy standards. The 16"L x 7"W Arm Support adds 2" of height to the armrest when installed. One per package.