T-Foam™ (Temper Foam) Combo™/SSI™ Cushion Get the pressure-reducing benefits of T-Foam withouth having to match body weight to T-Foam thickness and grade. A 1" layer of Medium T-Foam over a 1" layer of high-density foam and a firm, convex Solid Seat Insert™ base. This cushion will nestle into the hammocked area of any sling wheelchair seat to create a highly stable, flat sitting surface. Appropriate for users up to 200 lbs. 3-1/2" thick at center. Cover is silky blue, water-resistant AliTex™ with a no-slip vinyl bottom. Zipper. Machine washable.