FR MATERIALS: 6.5 oz lightweight heather canvas (100% cotton duck) with water-repellent and oil-stain resistant finish, built for rugged durability, includes FR buttons and aramid sewing threads, FR tag on left pocket. FASHION AND COMFORT: This FR work shirt features a Western cowboy cut and includes two additional multi-function pockets in front of the main left chest pocket. The unique cut and heather fabric make you stand out. Relaxed fit, big and tall size, prewashed and preshrunk, and machine washable. ENSURE SAFETY AT WORK: This work shirt meets or exceeds the standards for HRC 2 CAT 2, Arc Rating ATPV 8.5 cal/cm², and meets the requirements of NFPA 2112 standard on flame resistant garments for protection of industrial personnel against flash fire, 2012 edition. NFPA 70E, NFPA 2112, ASTM F1506 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. 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 while the FR protection remains effective. (NFPA 2112, ASTM F1506, CAT 2)