Drive's Gel-U-Seat Lite cushion is specifically designed to redistribute pressure to aid in the prevention of pressure ulcers while providing patient comfort by incorporating high-density foam surrounding a dual-chamber gel chamber. The low-shear fluid-resistant stretch cover includes tie-down straps to secure the wheelchair. Features and benefits. Specifically designed to redistribute pressure to aid in the prevention of pressure ulcers while providing patient comfort. The cushion incorporates high-density foam that encapsulates a dual-chamber gel chamber. Liquid-resistant elastic cover with tie-down straps to secure the wheelchair. The vinyl bottom is waterproof. Product specifications. Cover Material: Fluid resistant stretch nylon. Product Dimensions: 16.00 (L) x 16.00 (W) x 2.00 (H) Product Weight Capacity: 275 lbs. Warranty: 1 year limited. Model #