This LAPCO FR Uniform Shirt, model IMB73XL, is a flame-resistant work shirt constructed from 7 oz. 100% flame-resistant cotton twill fabric with a moisture management finish. Designed for industrial environments, it features four rows of lock stitching on the front placket, double-needle stitching on pockets, flaps, and shoulder seams, and is sewn with Nomex® thread for enhanced durability. It includes color-matched FR buttons, a button-down collar, and uniform styling with a back pleat for ease of movement. The shirt provides an Arc Thermal Performance Value (ATPV) of 8.7 cal/cm² and is Hazard Risk Category (HRC/CAT) 2 compliant. It meets NFPA 70E, UL Classified ASTM F1506, and UL Classified NFPA 2112 standards for protection against arc flash and flash fire hazard