Ariat Men's FR Brando Work Shirt - Moonless NightBuilt for the jobsite, office, or even when youve called it a day, our flame resistant button down shirts are a work week essential. With quality construction and the safety features you need, they keep you protected in tough environments. Safety CAT 2 Rating for dual hazard flame resistant workwear to help protect against flash fire and electrical arcs 8. 3 cal cm2 Rated to protect from second degree burns when exposed to an electrical arc NFPA 70E