Designed to handle the most rugged working conditions, this men's button-down shirt keeps you safe from dangerous arcs and flame. It's made of FR twill, with durable triple-stitched seams. The utilitarian design features two flap pockets on the chest.7-ounce, 88% cotton / 12% high-tenacity nylon FR twillMeets the performance requirements of NFPA 70EUL® classified to NFPA 2112Carhartt FR label sewn on left pocket; NFPA 2112/CAT 2 label sewn on sleeve placketCarhartt-strong triple-stitched main seamsButton-down collar and front; Flame-resistant melamine buttonsExtended sleeve plackets with adjustable two-button cuffsTwo chest pockets with flaps and button closures