Master Memory-Foam Seat Cushion, 17inH x 17 1/2inW x 2 3/4inD, Black

Helps reduce back strain and fatigue. Cushion can be used on the chair seat or chair back. Memory Foam conforms to the shape of your body. Attach by hook-and-loop strips and/or included elastic strap. The cover is washable for long-lasting use.