FOAMMA 1" X 18" X 20" High DensityUpholstery Foam Cushion (Seat Replacement , Upholstery Sheet , Foam Padding), Polyurethane Foam- MADE IN USA Density: 1.8 High Firm Density - Has a compression rate of 44 lbs Uses : Ideal for Square Chairs, furniture cushions, bench cushions, boat cushions, car cushions, back support, sofa seat replacement and all other home and commercial upholstery applications 100% Recovery Rate / Fire Retardant / High Quality / Professional Use Lasts 4-6 years