... anti static 3.Keep warm and soft Fire resistant man's thermal underwear Product introduction1,Use 100% FR cotton fabric,comfortable to wear ... and breath well.2, The underwear could be customizable with the function of thermal , anti static and fire retardant .3 ... etc.4, Size : S, M, L, XL, 2XL,3XL etc.5, Application :widely used in autumn and winter . Fire resistant man's thermal underwear