Premium 6 oz FR Cotton Fabric: This FR shirts Crafted with a high visibility twill reflective stripe design and is knit from 6 oz. of 100% fire resistant cotton to ensure breathability and durability while meeting strict safety standards. CAT2 Arc Rated & UL Certified Protection:Compliant with ATPV 12 Cal/cm² CAT2 Arc rated safety standards and UL certification, these shirts deliver certified protection flames. Self-Extinguishing Flame Resistant Shirts:Engineered as fire resistant clothing, these hi vis shirts resist combustion when exposed to flames self-extinguish immediately after ignition source removal, minimizing burn risks. Ideal for Industrial & Electrical Work:DPSAFETY fire retardant shirts are essential PPE for welding, electrical work, and industrial environments, trusted by professionals requiring reliable arc flash protection. Size Chart Guidance for Perfect Fit:Check the detailed size chart in product images to select your ideal fit, ensuring comfort and mobility for all-day wear in hazardous conditions.