5 in 1 Sound/Thermal/Vapor barrier,Odorless,Acoustics, 3mm, 200sqft underlayment
Thicker and stronger vapor barrier. IIC 73, STC 71. Advanced Acoustic, quiet, and comfortable while walking or standing on your floor. Superior Sound Insulation: IIC 73, STC 71. Note : Subfloor needs to be solid and strong enough to support the flooring.