National Safety Apparel BSTJTRC22X  FR Control 2.0 T-Shirt, Class 2, XX-Large, Fluorescent Yellow FR Control 2.0 Hi-Vis T-Shirt, Class 2 FR 5.5 oz. Mod acrylic Blend Base layer features: Segmented 3M Scotch lite FR Reflective Trim; Proactively regulates body temperature; Anti-microbial fabric to resist odors; Moisture Wicking (Arc Rating=4.0 cal/cm) HRC 1 NFPA 70E Compliant; Meets OSHA 1910.269