Milliken® Amplitude® Flame Resistant Fabric. Meets ASTM F1506 and OSHA 29 CFR 1910.269 requirements. 6 oz. 88% Cotton 12% High Tenacity Nylon FR Ripstop. Two chest pockets with flap and button through closure and pencil slot opening. Back yoke with side pleats. Triple needle topstitching. Rolled shoulders. Pencil slot. Button down collar. Nomex® thread. Melamine buttons. Extended shirt tail bottom. Warning label on lower right front of garment. Wolverine FR label on chest pocket. HRC1 label in chest pocket side seam.