. 13.5oz 100% cotton. Inherently Aramid sewing thread. Durable FRDURATEX FR fabric. Front with Aramid FR zipper and non conductive button closure. Relaxed fit. Bootcut leg with finished hems. UL certified NFPA 2112 - 2018NFPA 70E PPEASTM F1506ATPV 18 cal/cm2, HRC/CAT 2.