High density foam has a compression rate of 44 lbs. 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 don't want a cushion that's hard as a rock or a mattress that sinks when you sit on it, you have to check the compression or ILD number.
FoamTouch Upholstery Cushion High Density Standard, Seat
FoamTouch Upholstery Foam Cushion High Density, 4 H X
FoamTouch 3x24x72 high Density Polyurethane Foam, 3 x24 x72 inches, White : Arts, Crafts & Sewing
FoamTouch 3x24x72 high Density Polyurethane Foam, 3 x24 x72 inches, White : Arts, Crafts & Sewing
FoamTouch Upholstery Cushion High Density Standard, Seat
FoamTouch Upholstery Foam 3 Pack of High Density 1 Height x 36 Width x 72 Length Made in USA : Arts, Crafts & Sewing
FoamTouch 1 X 36 X 72 Upholstery Foam Cushion High Density : Arts, Crafts & Sewing
Professional 3 X 36 X 72 Upholstery Foam Cushion (Seat Replacement , Upholstery Sheet) : Arts, Crafts & Sewing
Foamtouch Upholstery Foam Cushions