TYPAR Surround S.R. Roofing Underlayment Roll 45" x 267' 1000 square foot 10 square roll - 45" extra wide width provides fast installation Up to 10 times lighter than 30# felt which makes it easy to carry on a roof Up to 10 times stronger than 30# felt provides tear resistance and ease of installation Slip-resistant surface is waterproof to prevent moisture issues