Stay-Put T-Gel Plus w/Solid Seat Insert (SSI) The cushion you can't lose! The Stay Put Cushion attaches to the wheelchair and remains in the chair when folded. Caretakers never have to worry about losing or misplacing a cushion again. The cushion is hinged in the center and is securely fastened under the sling seat using plastic snap clips. When the wheelchair is folded the cushion stays on the chair. Open the chair and the cushion is already there ready for use. Consists of a solid top sheet of polymer gel, similar in consistency to human flesh, over and underlay of temper (memory) foam and a solid seat base. The T-Gel top reduces shear while the temper foam optimizes weight distribution on the flat seating surface. Ideal for reducing shear and pressure. Patent No. 8,083,252 B2