FR MATERIALS:10.5 oz Cotton Durable Canvas Duck FR Treated Outside, lining 8.5 oz FR Cotton flannel, Quilt Lined with 100g Modacrylic/Cotton, Flame Retardant Zipper. JACKET CONSTRUCTION: Light Water/Rain Repellent and Oil/Stain Resistant. Zipper Front, Windproof Snaps Closure and Utility 4 Big Pockets Front.Windproof Rib-knit Cuffs, Elbow Double layer. Two inside Pockets with hook-and-loop closure. FR Coat. ENSURE SAFETY AT WORK: This Jacket meets or exceeds the Standards for HRC 4, Arc Rating ATPV 54 cal/cm², and meets the Requirements of NFPA 2112 Standard on Flame Resistant Garments for Protection of industrial Personal against Flash Fire, 2012 Edition. Also NFPA 70E ASTM F1506, and NFPA 2112 CAT 4, classified by UL. MORE USE TIME: UP TO 100 WASHES. Our jacket has the appropriate level of protective gear and stays enforced up to numerous washes. You can wear and wash it over and over again for up to 100 times before FR still works. (NFPA 2112, ASTM F1506, CAT 4) MULTI-USE: Made for Welders, Fitters, Ironworkers, Electricians, and other Industrial Workers, even at Home. It can be used for any Kind of Industrial and construction work. Our workwear protects you every day and helps you do heavy work.