This StainMaster Premium Flooring Underlayment covers 100 sq. ft. and is designed to improve comfort, reduce noise, and provide a moisture barrier beneath laminate, engineered hardwood, and other hard surface flooring. Includes the full roll of underlayment in original packaging. Item is in like-new, unopened condition. SKU: FLR-ON-57843. Internal ref: 5508466 #A65387.