There is no rule stating that FR garments should be uncomfortable, so why are you uncomfortable in yours? MCR Safety's 100% FR cotton long sleeve t-shirts will insure your safety AND your comfort when flame resistant clothing is required on the job. Our LST1 series FR shirts feature a soft and lightweight 6.5 ounce cotton fabric that provides 10.6 cal/cm2 (CAT2) protection. Each one meets the NFPA 2112 Standard for Flame Resistant Garments and NFPA 70E Standard for Electrical Safety in the Workplace. All MCR Safety FR garments are UL Certified and have a lifetime FR guarantee. There are enough things to think about on the job, don't let an uncomfortable shirt be one of them - choose MCR Safety FR gear.