Carhartt® protective long-sleeve shirt is made of 7-oz. lightweight, flame-resistant 88% cotton/12% nylon twill to protect workers from burns caused by electric arc or flash fires. NFPA 70E compliant. Features 2 chest pockets with flaps and button closures, flame-resistant melamine buttons, button-down collar, triple stitched main seams and a shaped shirt tail. Available in Khaki or Blue. Big style available in 3XL and 4XL sizes.