Amazon.com: Prime Foam Couch Cushion Replacement Wrapped with Polyester Batting, High Density Couch Cushions Inserts with Dacron Fiber Layer,Upholstery Cushion Padding (3x24x24)
How to Choose Cushion Foam for Upholstery - NaturalUpholstery.com
Replacement Sofa Cushion Fills
Amazon.com: FoamRush 3" x 34" x 34" Cool Gel Memory Foam Upholstery Square Cushion Medium Firm (Chair Cushion, Square Foam Dining Chairs, Couch, Sofa, Wheelchair Seat Cushion Replacement, Foam Rubber Padding) :
Couch Cushion Foam | Foam Solutions
Symphony- Memory Foam Square Shaped Bed & Sofa Cushion - Medium Firm – Inch & a Half