They are laminated with black non-woven fabric. The density of the carpet underlay is 85 kg/ ... FriendlyLamination:PE film both sides, non-woven fabric both sides, PE one side non-woven one sideOrigin:Manufactured in China, quality control ... packing with PE bag or outer cartonLaminated:PE,PVC, Non-woven, Aluminum foilMajor functions and advantages:1. Environmentally friendly2. Luxury underfoot ...