Flame Resistant FR Cotton Work Shirt - Whether working in the rugged oil and gas industry or spending your day working near electrical hazards, stay safe and comfortable in MCR Safety's FR Gear. The S1 work shirt features a comfortable 100% cotton fabric that meets the NFPA 2112-2018 Standard for Flame Resistant Garments and NFPA 70E Standard for Electrical Safety in the Workplace. All MCR Safety's FR Garments are UL Certified and have a lifetime FR guarantee. If you are looking for the best Flame Resistant (FR) clothing options, look no further than MCR Safety!