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.
6 X 24x 72upholstery Foam Cushion Medium Density (Seat
Made in USA Has A Compression Rate Of 36Lbs And It Features The Perfect Amount Of Cushioning And Stiffness 100 Percent Recovery Rate; Lasts From
FoamTouch 4x24x72MDF Medium Density (semi Firm) Upholstery Foam, 1 Count (Pack of 1), White
AK TRADING CO. Professional Upholstery Foam 2 India
Fakespot FoamTouch
FoamTouch Upholstery Foam 2 x 24 x 72 High Density Cushion
High+Density+FoamTouch+Upholstery+Foam+Cushion+3+X+24+X+72 for
5 x 24 x 24 High Density Upholstery Foam Cushion
Linenspa High Upholstery Foam-35 Density Cushion Craft Perfect for Chairs, Sofas, and DIY Projects Foam, 6 x 24 x 72, White
AK TRADING CO. Professional Upholstery Foam 2 India
High Density FoamTouch Upholstery Foam Cushion 5 X 24 X 72
FoamRush 2 x 24 x 72 Charcoal High Density