Heavyweight, 13oz., 100% cotton FR duck, 11.5oz. FR quilt lining: FR modacrylic batting quilted to FR twill face cloth, brass front zipper with Nomex FR tape plus inside and outside protective flaps with hook and loop closure for electric arc protection, two lower front pockets, two inside patch pockets with FR hook and loop closures, Nomex FR rib knit cuffs and waistband, attached quilt lined hood with adjustable Nomex FR drawcord, back length: large regular – 29 inches; large tall – 31 inches, Carhartt FR and NFPA 2112 cat 4 labels sewn on zipper flap, meets the performance requirements of NFPA 70e and is UL classified to NFPA 2112.