Caterpillar Men's Flame Resistant Twill Shirt 88% Cotton, 12% Nylon Imported Machine Wash Left chest pocket with button flap closure and pen pocket Eyewear loop on front placket Adjustable cuffs with button placket Double layer back yoke NFPA 2112, NFPA 70e, ASTM f1506, OSHA 29 CFR 1910-269, HRC 2