Drive Medical"s Gel "E" 3 cushion features a viscous gel bladder for pressure reduction, support and comfort. The gel bladder is inserted in a polyurethane foam shell for additional support and comfort. What Makes This DifferentThe cushion aids in the prevention of pressure ulcers. It has a removable and replaceable cover with a water resistant vinyl top and a convenient non-slip base.Why We Like ItBecause this cushion is available in five sizes you are more apt to get the best fit for your seating surface. This cushion will accommodate a user up to 275 lbs.What You Need to Know When OrderingThis cushion is best for those at low risk for skin-breakdown.