Foamrush 4 inch x 22 x 22 inch Upholstery Foam High Density Firm Foam Soft Support Chair Cushion Square Foam for Dinning Chairs Wheelchair Seat

High density foam has a compression rate of 20kg. It features the perfect amount of cushioning and stiffness. Its soft but still holds its firmness and support for an individual to sit on it without compressing the foam too much. Compression = firmness compression not density is what determines firmness. If you dont want a cushion thats hard as a rock or a mattress that sinks when you sit on it you have to cheque the compression or ild number. Compression means the number of pounds necessary to compress a piece of foam 25% and still bounce back to the original thickness. For example a 10cm thick piece of foam that requires 20kg. To pack it down 2.5cm and have it return to its full 10cm thickness has a 20kg. Compression rating or ild -indention load deflection. all foam sheets are sold per sheet not per yard. Do not open with a box cutter. Use a ball point pen or a pencil. Start by making a little incision and break it from there durability : will last 7 to 10 years high density foam is used for firmness yet relax able cushion. It has high quality compression and material to keep it lasting for longer periods of time even when harsh weight is applied. Your item must be unused and in the same condition that you received it in.Polyurethane foam
Upholstery foam cushion high density standard seat replacement upholstery sheet foam padding