House of Thread Upholstery Foam Premium Quality Replacement Foam Sheet Cut to Any Size High Density Garden Furniture Cushions Seat Pads for Seating, Stool, Expanding Foam 60"x20"x 1" : Amazon.co.uk
Polyethylene closed cell foam in sheets or cut to size
RS PRO Black Polyethylene Foam, 1m x 2m x 10mm | RS
Polyethylene Foam 18” X 4” - Etsy UK
EsportsMJJ 30x30x3cm EPE Polyethylene Foam Sheet Pearl Cotton Material for Packing Cornor Protection : Amazon.co.uk: Business, Industry & Science
Polyethylene closed cell foam in sheets or cut to size