Flame resistant twill, 90% pima cotton; 10% high tenacity nylon 240 gsm; 7oz 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 8 • 6 cal/cm² • NFPA 70E-2004 • NFPA 2112-2012 • ASTMF 1506-2010a