FR MATERIALS: 6.5 oz lightweight cotton twill FR treated with a water-repellent and oil-stain-resistant finish, fire-resistant mesh panels, YKK pearl snap buttons, and aramid sewing threads, FR tag on sleeve. 2.4" yellow Hi-Vis tape with 1" FR reflective silver stripe-ANSI/ISEA 107-2020 Type O Class 1. DESIGNED FOR SUMMER: This High Vis Flame-Resistant relaxed-fit western work shirt is built for safety and comfort on the job. Designed with breathable Vented mesh panels covered back underarm for better airflow, it keeps you cool during tough tasks on hot days; prewashed, preshrunk, and machine washable ENSURE SAFETY AT WORK: This garment meets or exceeds the standards for HRC2, Arc Rating ATPV 8.2 Calories/cm2, and the requirements of the NFPA 2112 standard on flame-resistant garments for protection of industrial personnel against flash fire, 2012 edition, NFPA 70E, ASTM F1506, and NFPA 2112 CAT II. MULTI-USE: Made for welders, fitters, ironworkers, electricians, and other industrial workers who need safety reflective hi-vis workwear. 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)