The Carhartt Men's Sandstone Bib Oberall is constructed of rugged 12-ounce, cotton sandstone duck and perfect for being on the job. It features multiple utility and tool pockets, hammer loop, brush loop, and double knees with cleanout bottoms to accommodate knee pads. Back pockets are reinforced for durability. *12-ounce, 100% cotton sandstone duck, heavyweight *Un-Lined *Double knees.