Warmth Rating Earned: Level 3 - Warmest Engineered For High Warmth in Severely Cold Conditions. See Technology section below for more details. This men's rugged layer takes our classic active jac and adapts it for the most hazardous work conditions out there. It's made with heavyweight cotton canvas that fights off wind and cold while providing protection against flames. A quilted lining adds extra warmth and comfort. Features 13-ounce, 100% cotton FR duck 11.5-ounce FR quilted twill lining; 100% flame resistant modacrylic resin 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" Model No. OJ1621-FRM Country of Origin: Imported Engineered For High Warmth in Severely Cold Conditions Our WARMEST rated gear was built for brutally cold conditions. Combining tougher fabric, lighter insulation, and smarter technologies into gear that delivers higher amounts of warmth for those frigid mornings that even trucks need more time to warm up. With only one level higher, our LEVEL 3 jackets, coats, and bibs come ready to conquer cold. Size small SMALL 34 - 36 28 - 30 34 - 36 Only warn a few times