3' x 65', MS-300 Ice & Water Armor, 2 Square Roll, Self Adhering Mat, Modified Bituminous Roofing Underlayment Glass Fiber Reinforced For Use Under Tile, Slate & Asphalt Shingles, Mineral Granules On Surface To Enhance Skid Resistant Properties, Valley Liner Or Eave & Rake Guard Against Ice Damming & Or Wind Driven Rains That Could Cause Leaking.