Type R. Class 3 Modacrylic. FR vest has 2 modacrylic FR mic tabs, zipper closure, 2 inner pockets and a D-ring slot. Meets ANSI/ISEA 107-2020 Type R Class 3 FR, ASTM F1506/NFPA 70E CAT 1 and ARC rating (ATPV): 4.0 cal/cm2. Modacrylic Flame Resistant Solid Material. 2" FR silver reflective tape.