FRB229 - M FR Duck Dungaree Carhartt's flame-resistant duck work dungaree is made to last. Made of 13-ounce, 100% cotton flame-resistant duck, it had a full seat and thigh, multiple tool and utility pockets and hammer loop. It also features an arc-resistant high-tension snap closure at waist, bass zipper fly with Nomex® zipper tape, two reinforced back pockets, triple-stitched main seams and 19-inch leg openings to fit over work boots. NFPA 70 E compliant. Read more about Carhartt's flame-resistant line.*13-ounce, flame-resistant duck *Left leg hammer loop *Triple-stitched main seams * Click Here For Technical Information