REGUPOL sonus core 5 Acoustic Underlay for engineered timber, bamboo, laminate and parquetry flooring
XPS Underlay 5mm Thick - Wood or Laminate Flooring - Insulation Like Fibreboard | eBay
Acoustic Rubber Underlayment 5mm 10mm Apartment Floor Soundproof - China Soundproof Underlay, Building Materials | Made-in-China.com
FloorComfort 4-ft W x 25-ft L x 5 T Premium Foam Moisture Resistant Flooring Underlayment (100-sq ft / (Fan fold) in the Flooring Underlayment department at Lowes.com