Seat contruction FOAM block / mat, high density, 2cm + foam sheet for egalization

Upholstery Foam High Resilient Density 2.0

FoamRush 3 x 22 x 22 Upholstery Foam High Density Firm Foam Soft Support (Chair Cushion Square Foam for Dinning Chairs, Wheelchair Seat Cushion Replacement) : Arts, Crafts & Sewing

Upholstery Foam High Resilient Density 2.0

Foam Upholstery High Density High Density Sponge Cushion - Seat Foam Sheet/padding - Aliexpress

AMZQNART Craft Foam Blocks, 1 in Thick 17x11 EPS Polystyrene Rectangle Foam Blocks Packs of 7 Pcs for Art Sculpting, Sculpture, Modeling, School and Home DIY. : Arts, Crafts & Sewing

Blue Upholstery Foam Sheet Cut to Any Size,High Density Floor Cushion Sofa/Chair/Bench/Stool Seat Padding Sheet,Dog Bed Mattress : Arts, Crafts & Sewing

Hot Selling 35-40 Shore C Hardness High Density EVA Foam Sheet Used for Building/Packaging/Glass Cushioning Shock Protection - China EVA Material, Open Cell Foam

Foam sheets

FoamRush 1 x 12 x 18 Charcoal High Density Upholstery Foam Cushion (Upholstery Sheet, Foam Padding, Seat Replacement, Chair Cushion Replacement, Square Foam, Wheelchair Seat Cushion) Made in USA : Arts

Queenbox 2cm/0.78 Thick Upholstery Foam Cushion High Density Craft Foam Seat Replacement, Sheet, Padding, 60 x 200cm/ 23.6 x 78.7 : Arts, Crafts & Sewing