FR MATRIALS: 7.5oz Cotton Twill FR Treated, FR Pearl Snaps, FR Sewing Threads.Water/Rain Repellent And Oil/Stain Resistant Finish.Clear FR Tag on Left Pocket.More FR info on Neck Tag About UL Certification. We Attached A Small Sample Inside Package For Cunstomers Simple FR Try FASHION AND COMFORT: This FR Work Shirt Provides A Perfect And Comfortable Fit Also Soft And fashionable. We Did Prewash/ Preshrunk And Wrinkle-Free ENSURE SAFETY AT WORK: This garment meets or exceeds the standards for HRC2, Arc Rating Atpv 10.1 Calories/cm2 and the requirements of NFPA2112 Standard on Flame Resistant Garments for Protection of Industrial Personnel Against Flash Fire,2012 Edition. Also NFPA70E ASTM F1506 AND CAT II Classified! 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 Protects You Everyday And Help You Doing Heavy Works MORE USE TIME: UP TO 100 WASHES. Our shirts have the appropriate level of protective gear and stay 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)