Ariat Men's Flame Resistant Work 1/4 Zip 74% Cotton, 24% Modal, 2% Spandex Made in US Machine Wash Meets the Hazard Risk Category rating of HRC 2 Rated over 9 in Arc Thermal Performance Value ATPV 9.5 FR Durable soft twill that is comfortable against your skin Clearly labeled per OSHA requirements as FR and HRC2 NFPA 70E and NFPA 2112