HRC 2 Arc Flash Shirts - 8 to 14 Cal This page contains NFPA 70E rated arc flash shirts that are HRC level 2 and have a calorie rating of 8 to 14 cal/cm2. Chicago Protective Apparel Arc Rated Khaki Work Shirt This FR work shirt is made with 7 ounce Indura Ultra Soft fabric in Khaki color.