Comfort Gel Cushion by Allman Products $48.30 2.5" x 16" x 18" - $48.30 2.5" x 16" x 18" Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart SofGel & foam gives improved weight distribution Royal blue material is water-resistant Black bottom of cushion is a non-skid material for safety Velcro straps on the back of 18” side for secure hold Accommodates up to 250 lbs.