0.5mm-5mm Blue EPE Foam Underlay - China Waterproof Carpet, Laminate Flooring | Made-in-China.com
5mm XPS Laminate Flooring Underlay - Wood Flooring Kent
Classic 5mm XPS Underlay Insulation for Laminate or Wood Flooring
5mm Sonic Gold - Acoustic Underlay - British Flooring
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
5mm Pre-Cut Rubber Underlayment - Soundproof Your Floor