Roofers Choice II Synfelt is the best grade synthetic roof underlayment for balancing performance and price for your DIY roof project. Roofers Choice II Synfelt roofing underlayment provides a better alternative to 15# and 30# felt paper for all roof cladding DIY roof projects including shingles, metal, tile and slate. Roofers Choice II Synfelt is based on RoofTopGuard II Premium Synthetic concepts of safety and performance. Roofers Choice II Synfelt roofing underlyament has an added topside that provides your DIY roof project with extra safety by providing all weather walkability. Roofers Choice II Synfelt is proudly made in the USA.