6.2 oz., modacrylic flame-resistant mesh material; 2" wide breathable reflective material; FR hook-and-loop front closure; Two lower inside patch pockets; Left chest inside two-tier, four-division pocket; ANSI/ISEA 107 2015 / ANSI/ISEA 107 2020 Type R | Class 2NFPA 70E-2012 | ASTM F1506 | ARC 1Arc Rating/ATPV: 4.6 cal/cm2Fabric dye lot variances may occur and meet luminance factor as stated in the standard.;