FR MATERIALS LIGHTWEIGHT:5.5 oz knit featured flame-resistant treated cotton, stitched with FR aramid threads. Eye-catch FR Tag on pocket. We have included a small sample inside the package for customers to try out the FR properties firsthand. FASHION AND COMFIT: This FR work shirt provides a perfect and comfortable fit, Soft and fashionable. we have pre-washed and preshrunk the shirt to prevent any shrinking or distortion after washing. It is also wrinkle-free, making it easy to maintain a neat and professional appearance. ENSURE SAFETY AT WORK: Our FR shirt is designed to prioritize safety in the workplace. It meets or exceeds the standards for HRC2/CAT2 and has an Arc Rating ATPv of 8.0 Calories/cm2. It also complies with the requirements of the NFPA 2112 Standard on flame-resistant garments for protection of industrial personnel against flash fire, 2012 edition. NFPA2112 NFPA70E ASTM F1506 Classified. MULTI-USE: Made for welders, fitters, iron-workers, 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. 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 up to 100 times before the FR still works.(NFPA2112,ASTM F1506,CAT II)