Bulwark PNW2 Flame Resistant Nomex Work Pant Bulwark Flame Resistant Nomex Work Pant 6 oz. Nomex III. 93% Nomex Aramid / 5% Kevlar Aramid / 2% Other Fiber. Interlined waistband w/ button closure, permanent crease. Two slack-style front pockets, two set-in hip pockets, left hip with button closure. Autoclaved. Arc Rating ATPV 5.6 calories/cm2