Fire resistant man's thermal underwear 1.100% FR cotton fabric. 2.With the ... and soft Fire resistant man's thermal underwear Product introduction1,Use 100% FR cotton fabric,comfortable to wear and breath well.2, The ... .3, Color : grey, navy blue ,white ,black etc.4, Size : S, M, L, XL, 2XL,3XL etc.5, Application :widely used ...