Polyethylene closed cell foam in sheets or cut to size
DURAFOAM High Density Blue Firm Foam Sheet For Upholstery, Cushions, Sofa, Beds, Seats, Campervans, Indoor/Outdoor Padding, DIY - DF190B - 80 x 45 x 2 inch (200 x 114 x 5cm) : Amazon.co.uk: Home & Kitchen
Restwell Foam Sheet ( Sheela Group ) from the house of Sleepwell
Premium High Density Hard Foam Sheet - 1/2 inch (12mm) Blue
High Density Upholstery Foam Sheet - 80" x 20" - ½", 1", 2", 3", 4", 5", 6" | eBay
Source 1 2 inch thin foam sheet,thin eva foam sheet 1mm 2mm 3mm 4mm 5mm 6mm 7mm 8mm 10mm 15mm 20mm on m.alibaba.com
Nowotex White 4 x 6 Feet EPE Foam Sheet, Thickness: 5 Inch
White EPE Foam Sheet, Thickness: 2 Inch, Size/Dimension: 6x3 Feet
Upholstery Foam Sheets - Next Day Delivery
Heat Foam Sheet 6mm | Profoil
Polyethylene Foam Sheets 2.2LB | Foam Factory, Inc.
Foam sheets
Blue Foam Sheet - High-Density-FIRM Foam Sheet - 80" x 20" x ½" 1" 2" 3" 4" | eBay
White Foam Board - UK Foamboard Cut to Size
Firm High Density Upholstery Seating Foam Reconstituted Chip - Etsy UK