Feature 1. High-quality carpet underlay 2. Good sound insulation and thermal insulation 3. Adhered to PU film / waterproof film / non-woven fabrics and etc. 4. Packing in rollsSpecification 1. Thickness0.25-0.50inch 0.60cm-1.27cm 2. Width54inch137cm for Europe Market,72inch183cm for US Market 3. Density: 4.0lbs-8.0 lbs/cu. ft.65-130kg/m3 4. Lengthas required