FR MATRIALS：14OZ 100% Cotton Denim FR Treated,FR Buttons,FR Sewing Threads!Clear FR Tag on Pocket front.More FR info On Tag About UL Certification. FASION AND COMFIT:Design as a Normal Fasion Jeans Good Looking!This Flame Resistant Work Jeans Provides A Perfect And Comfortable Relaxed Fit. Also Soft And fashionable.We Did Prewash/ Preshrunk And Wrinkle-Free.Machine Wash No Shrink! Double needle stitching on outseam. ENSURE SAFETY AT WORK :This garments meets or exceeds the standards for HRC2,Arc Rating Atpv 16 Calories/cm2 and the requirements of NFPA2112 Standard on Flame Resisant Garments for Protection of industrial Personal Against Flash Fire,2012 Edition.Also NFPA70E ASTM F1506 AND CAT II Certified! 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 works.More Durable Fabrics Pockets In Just The Right Places With So Many Features That Help You Get The Job Done. Our Workwear Pretect You Everyday And Help You Doing Heavy Works. MORE USE TIME: UP TO 100 WASHES ,Our shirts 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.(NFPA2112,ASTM F1506,CAT II) Enjoy the comfortable and Prewashed Good Looking. you'll find in this advanced comfort relaxed fit pants. Advanced mobility for greater productivity. Flame resistant features include an arc-resistant button waistband closure, FR zipper tape, flame resistant pocketing, FR thread used in all garment seams and safety. Our Jeans meet the performance requirements of NFPA 70E and NFPA 2112.