Oil and Gas Safety Supply Flame Resistant FR HRC 4 Insulated Reflective Bib Overalls Flame resistant 9 oz FR twill weave with 14oz modacrylic quilted liner reflective tape around leg, one band across the top of the bib two-way heavy duty brass zippers on aramid tape Ratings for flame retardant or flash fire: CAT 4 ATPV 47.3 NFPA 70E NFPA 2112