Developed by YCS, the Hybrid Vapor Barrier combines the benefits of string-reinforced and 100% woven vapor barriers, creating the ultimate solution for crawlspaces and basements. Made with ten layers of 100% virgin polyethylene, it offers best-in-class protection from tears and punctures, carries a 0.00 perm rating, and features a bright, glossy white finish. It also forms a permanent seal through molecular adhesion with YCS Magic Seam Tape.