Seat Cushion Color Black Cover Material Fluid-resistant Cover Dimensions 22 X 18 X 3 Inch Inflation Type Non-inflatable Material Gel / Foam Securing Method Straps UNSPSC Code 42192208 Weight Capacity 350 lbs. The Dura-Gel SP III (Skin Protection) wheelchair cushion reduces surface pressure through the use of non-aqueous Dura-Gel placed in three pressure zones The cushion uses a high-density base foam in combination with a visco-elastic topper for added comfort and also positions the user with a moderate slope from front to back For use with moderate risk patients Reduces tissue interface pressures at critical points The soft, stretchable lightweight cover reduces shear/friction and is fluid resistant and has a strap at the back to secure the cushion firmly to the chair 18 month limited warranty