Carhartt R27 Sandstone Bib Overall with Carhartt's Quilt Lining. 12 ounce, 100% cotton sandstone duck. 100% nylon quilted to midweight polyester lining. Multiple tool and utility pockets. Hammer loop. Double knees with cleanout bottoms that can accommodate knee pads. Back brush loop and reinforced back pockets. Ankle to knee leg zippers with protective wind flaps. Metal rivets at vital stress points and Carhartt's famous triple stitched main seams.