10 oz./yd², 88/12 cotton/ nylon flame resistant duck; Heavyweight quilted flame resistant twill; Heavy-duty flame resistant brass zipper; Deep bi-swing action back; Two flame resistant lined front patch pockets; Triple-needle stitched main seams; Meets the requirements of ASTM F1506, NFPA 70E, NFPA2112, and OSHA 1910.269;