Keep out the chill in a Carhartt's Men's duck bib overall and secure in the warmth. Made of 12-ounce, heavy-duty cotton duck, it has a 100% nylon quilted, polyester midweight lining. It features a zippered fly, leg zippers that open to knee with protective wind flap, multiple tool and utility pockets, and a hammer loop. It also has triple-stitched main seams, metal rivets at stress points, and double knees to accommodate knee pads. *12-ounce cotton duck, heavyweight *Quilt Lined * Double knees to accommodate knee pads.