1Best feelings, 2sound absorption, 3Thermal Insulation, 4Fitter Friendly 5lower price but best choice! foam underlay ItemSpecificationNameFoam UnderlayTop SurfaceNon-woven fabricBottom Surface Non-woven fabric Thickness 7mm-15mmDensity80kg/m3 / 90kg/m3 / 100kg/m3Size of roll11m ×1.37m = 15m2Character Sound Absorption, Thermal Insulation, Fitter FriendlyApplicationDomestic use, Lay Flat down ...