Memory Foam Cushion, manufactured by Carex, is an ergonomically designed Cushion that can be used in any chair, including a wheelchair. This Cushion will help it’s user to achieve better posture and while sitting. The Memory FoamChair Aid Cushion will help someone maintain stability as they sit. Stability is particularly important when someone has difficulty balancing or is in a wheelchair. These Memory Foam Cushions Have a polyester and rayon cover.