Fiber Cushion is a lower cost alternative to the traditional Polyurethane based upholstery foam that you would expect in a living room coach or chair.
30x30x2 Fiber Foam Cushion Patio & Marine Cushion Alternative
Style Selections 20-in x 21-in Salito Marine High Back Patio Chair
Outdoor Upholstery Foam
AAAAAcessories Outdoor Deep Seat Cushions for Patio Furniture, Water-Resistant Replacement Patio Chair Cushions, 24 x 24 x 5 inch, Black : Patio, Lawn & Garden
Marine & Patio - OUTDOOR CUSHION & FOAM - FIBER CUSHION (FLO-THRU
Outdoor Upholstery Foam
Marine+fabric - Fabric Warehouse
Alternative to foam upholstery? : r/upholstery
Outdoor 2 Pack Deep Seat Chair Patio Cushions Memory Foam 24X22X4 Waterproof 2 Layers Cover
Replacement Cushions Foam
Alternative to foam upholstery? : r/upholstery
Easy-Going Waterproof Patio Cushion Covers 24x24x4
Outdoor Upholstery Foam
Outdoor Foam Seats & Cushions
How to upholster a chair backseat in this style : r/upholstery