Firm Foam, Cover Made of Durable Black Leatherette with 5" Strap Handles, Foam Meets CAL #117 Requirements Firm 4" foam cushion provides lift and comfort while a hardboard insert provides extra support to eliminate hammock effect when used in wheelchairs. Cover made of durable black leatherette with 5" strap handles. Can be used in wheelchairs, conventional chairs or anywhere additional height is needed. Size: 16" x 16" x 4". Foam meets CAL #117 requirements.