7 oz. 100% flame-resistant cotton twill with a Moisture Management finish, Four rows of lock stitching on the front placket to prevent unraveling, Double-needle stitching on pockets, flaps, and shoulder seams, Sewn with Nomex thread, Color matched FR buttons, Uniform styling with back pleat for ease of movement, ATPV 8.7 cal/cm2, HRC/CAT 2, NFPA 70E compliant, UL Classified ASTM F1506; NFPA 2112, Put safety and comfort first when you pull on this uniform shirt from Lapco. This shirt has flame-resistant cotton construction that will protect your skin from grease, dirt, and flames. The double-needle stitching makes this shirt extremely durable and the four rows of lock stitching on the front placket prevents unraveling. Fill your closet with high-quality work apparel from Lapco.