Flame Resistant FR Bib Overall Denim FRC. Bib Overall. Coverall. Flame resistant fabric13 oz denim FR twill: 100% cotton Elastic adjustable shoulder straps Zippered pocket on chest w/ 2 pockets over Ratings for flame retardant or flash fire: CAT 2 ATPV 16.4 NFPA 70E NFPA 2112