Attaches to highbacked wheelchairs of any width with straps. Padded; adjusts to fit the head. Wipe clean vinyl upholstery covers resilient foam and sturdy 3/4" plywood. Back is 15-1/2"L x 7-1/2"W. Supports are 5"D x 4"W x 8-1/2"H. Straps are 14"L. Latex free.