The SafeGuard 30 roofing underlayment combines the proven technology behind asphalt based underlayments with a new high-performance non-woven polyester reinforcement. The durability enables SafeGuard30 to hold fasteners better and provide better tear strength and puncture resistance than synthetics or felt. SafeGuard 30 un-rolls nice and flat in warm and cold weather, weighs less than felt and provides greater coverage per roll, which all means time saved during installation. A lightweight, easy to handle, nicely rolling, underlayment. Easy to install, and you get 4.5 squares to a single roll.