A good underlay under your carpets/floor not only give them more comfortable feel, it also extends the life of them. Construction: APT core with paper and corona treated polymer film Thickness: 6mm -12mmDensity: 60kg/m3---120kg/m3Width: 1.37m or 1.83m (4.5' or 6') Length: Subject to your request . Environmentally friendly . Luxury underfoot comfort . Impact Resitant . Flame Retardant . Antibacterial - for healthful environment . Moisture proof. Noise reduction . Extends the life of your carpet/Floor