Carhartt's duck bib overall is made of heavy 12-ounce, cotton duck for when you need your outfit to be tough and warm. 12-ounce, firm-hand, 100% cotton ring-spun duck · Adjustable front-elastic suspenders · Multicompartment bib pocket · Zipper fly · Two large lower-front pockets · Left-leg hammer loop · Double knees with cleanout bottoms that accommodate knee pads · Two reinforced back pockets · Triple-stitched main seams