It has an arc rating of 4.6 cal/cm² and is compliant to ANSI 107 Class 2. It features 2” FR reflective striping and a breathable design. An inner left chest pocket provides storage, and is just one of the great finishing details on this FR hi-vis vest. Additional Hi-Vis Flame Resistant Mesh Safety Vest, Class 2 features: Arc rating: 4.6 cal/cm²