FR MATRIALS:7.5oz cotton twill FR treated,FR buttons,FR aramid sewing threads, 2.4" yellow reflective tape with 1" FR siliver paint-ANSI/ISEA 107-20 Type O CLASS 1.!More area reflection on back and arm.Clear FR tag on arms and more FR info on inside tag about UL certification.We attached a small sample inside package for customers simple FR try FASION AND COMFIT:This FR work shirt provides a perfect and comfortable fit ,US standard size,Regular and big-tall size ENSURE SAFETY AT WORK :This garments meets or exceeds the standards for HRC2,Arc Rating Atpv 10.1 Calories/cm2 and meets the requirements of NFPA2112 Standard on flame resistant garments for protection of industrial personnel against flash fire,2012 edition.Also NFPA70E ASTM F1506 and NFPA2112 CAT2 Classified by UL! 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.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) This easy-wearing, hard-working 7.5OZ cotton FR High Vis Long Sleeve Comfortable Men's Unifrom Shirt. Button-Down. FR Buttons. Our shirts certified NFPA2112 in UL and CAT II.