McKesson Back Support Cushion, 18 x 17 Inch, Black

High-density polyurethane foam conforms to provide support to lumbar region. Stabilizing board insert prevents hammocking in sling-back wheelchair. Stretch, nylon cover is low-shear, breathable and removable for convenient machine-washing. Adjustable safety straps to maintain appropriate position and add security 18 inches wide x 17 inches deep