Carhartt Men's Flame Resistant Classic Twill Shirt 88% Cotton, 12% Nylon Imported Machine Wash NFPA 70E Compliant NFPA 2112/HRC 2 labels sewn on left pocket Original Fit 7-ounce, FR twill: 88% cotton/12% high-tenacity nylon FR melamine buttons throughout Two chest pockets with flaps and button closures Extended sleeve plackets with two-button adjustable cuffs Triple-stitched main seams