Flame resistant twill, 90% pima cotton, 10% high tenacity nylon 200gsm; 5.8 oz Aramid high tenacity flame resistant thread • Button-down collar • Flame resistant plastic buttons • Two chest pockets with flap and button-through closure Meets the following standards • HRC2 - Arc rating: ATPV 7. 7 cal/cm² • NFPA 70E-2004 • NFPA 2112-2012 • NFPA 1975-2009 • ASTMF 1506-2010a • OSHA 29 CRF 1910. 269