20" (W) X 18" (D) X 2" (H) Gel-U-Seat Lite General Use 2" Gel/Foam Wheelchair Cushion. * Offering great versatility, the Gel-U-Seat Lite provides comfort to almost all wheelchair users. * Unique dual-chambered gel bladder keeps the pelvis in contact with pressure redistributing cooling gel. * The cover is fluid resistant low-shear nylon; zippered and removable with a durable vinyl bottom. * Secures easily to wheelchair with 12" tie straps. * Meets flammability standard TB117. *