Amazon.com: Foamma 6" x 24" x 28" High Density Upholstery Foam Padding, Thick-Custom Pillow, Chair, and Couch Cushion Replacement Foam, Craft Foam Upholstery Supplies, Foam Pad for Cushions and Seat Repair :
What is the Best Foam to Use for Sofa Cushions? - FoamOnline