The Carhartt 100647 heavyweight, 14.25-ounce, FR knit is a 58% cotton/35% modacrylic/7% polyester blend with a Rain Defender™ durable water-repellent finish. The thermal lining is no slouch either: 7-ounce, FR knit of 55% modacrylic/45% cotton. It features stretchable, spandex-reinforced rib-knit cuffs and waistband, a three-piece thermal-lined hood, brass front-zipper with Nomex® FR zipper tape plus inner and outer protective flaps, two front hand-warmer pockets, and an inside patch pocket. Carhartt FR and HRC 3 labels are sewn on the left-front pocket. Meets NFPA 70 E standards.