QuietWalk is a premium underlayment allowing firm support for multiple types of flooring with great acoustic benefits. This product is built with sound reduction and moisture dissipation in mind. The unique DriWick technology relies on a blend of antimicrobial treated recycled fibers that will wick away subfloor moisture, while the attached 6-mil vapor barrier is specially designed to protect your flooring from water damage, and protect your subfloor from topical spills and accidents. Covers 100 Sq Ft - Roll Size: 33.33 ft. x 3 ft. x 1/8 in.