... , 3Thermal Insulation, 4Fitter Friendly 5lower price but best choice! foam underlay ItemSpecificationNameFoam UnderlayTop SurfaceNon-woven fabricBottom Surface Non-woven fabric Thickness ... , Fitter FriendlyApplicationDomestic use, Lay Flat down fabric backing face upwardsQualityISO9001:2000 Standard Foam Carpet Underlay &sponge underlay