Specifically designed by the YCS team of product engineers, the YCS Hybrid Vapor Barrier combines the benefits of a string-reinforced vapor barrier and a 100% woven vapor barrier to create the ultimate solution for crawlspaces and basements. With ten layers of 100% virgin polyethylene, the YCS Hybrid Vapor Barrier offers best-in-class protection against tears and punctures. It also features a .00 perm rating and a bright, glossy white finish for a polished appearance.