Roberts 70-010-XL QEP Roll of Serenity XL Polyethylene Foam Laminate Underlayment, 400 Square Feet 3/32 inch (93.75 mil) thick Polyethylene Foam for laminate and engineered wood flooring Adds comfort and cushioning to your flooring installation Easy to handle, roll out, and install 400 sq. ft. roll Corrects minor subfloor imperfections