Epilay™ Superior is 25 times stronger than #15 felt and #30 felt and 4x lighter than #15 felt and #30 felt. With a 7-mil thickness, a 10 square roll weighs only 23 lbs! This super low weight combined with 48" width and 250 ft. run length means big savings in time and labor - over 30% faster to install than felt! These unique design features, when coupled with Epilay™ Superior's exceptional light weight and exceptional tear strength, allows the contractor to easily carry the roll up and down the ladder. Fewer laps, cuts, and roll handling means you can do more jobs in less time.