White Foam Underlay for Any Laminate/Real Wood Flooring 2mm Acoustic/Insulation Underlay Comfort Flooring Underlay (Roll Dimension: 15㎡) : Amazon.co.uk: DIY & Tools
QUIETBOARD 90 sq. ft. 2 ft. x 3 ft. Premium Acoustical and Insulating Fiber Floor Underlayment with Integrated Moisture Barrier QBOARD23 - The Home Depot
STEICO Natural acoustic wood fiber underlayment 2-ft W x 3-ft L x 6 T Premium Cushion Flooring Underlayment (90-sq ft / (Panel) in the Flooring Underlayment department at Lowes.com