Ergodyne N-Ferno 6820 Fire Resistant Thermal Knit Beanie Cap, Black Shell: Modacrylic Cotton Blend Lining: Modacrylic Cotton Blend Fleece Reflective accent for higher visibility Meets Performance Requirements of ASTM F1506 and NFPA 70E (HRC 4) Arc Rated; ATPV rating of 49.5 cal/cm2