Hawk Leak-proof Laminated Canvas Drop Cloth 9' X 12': AC-97912 Made of 100% unbleached natural cotton with polypropylene backing preventing paint from leaking Lightweight 6 ounce canvas with durable double stitched seams + natural cotton absorbs paint! 100% Leak proof polypropylene backing - provides superior protection compared to cotton only Designed for indoor and outdoor use with mildew, rot and water resistance Folds to a small and compact size for easy storage - overall dimensions - 9 feet x 12 feet