underlayment: 1.UNDERLAYMENT CAN EXTEND THE LIFE OF YOUR CARPET, 2.IMPROVE UNDERFOOT ... ) Thickness: 3/8 inch,7/16inch,1/2inch,4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm4) Compound Material:Crepe Paper ... -7000m2 will go into a 40'HQ container laminate flooring underlayment has SGS