- 13-ounce, 100% cotton FR duck - 11.5-ounce FR quilted twill lining; FR modacrylic batting insulation for warmth - Meets the performance requirements of NFPA 70E - UL® classified to NFPA 2112 - Carhartt FR label sewn on front pocket; NFPA 2112/CAT 4 label sewn on zipper flap - Quilt-lined hood with adjustable Nomex® FR drawcord - Brass front zip with Nomex® FR zip tape; Inner and outer hook-and-loop storm flaps for electric-arc protection - Nomex® FR rib-knit cuffs and waistband - Two lower-front pockets - Two inner patch pockets with FR hook-and-loop closures - Back length: Large regular: 29"; Large tall: 31"