Roberts Premium Felt Underlayment for Engineered and Laminate flooring.Provides deep, rich sound by absorbing noise instead of deflecting itMade from recycled fibersExtremely high temperature manufacturing process disinfects and treats fibers3mm thick pad correct minor sub-floor imperfectionsAdded R-Value to chilly floorsIncludes adhesive strip and 3 in. overlap film for linking multiple rollsFor use under engineered and laminate flooringIIC 67, STC 66100 sq. ft. per roll