7-ounce, 87% cotton/7% high-tenacity nylon/5% polyester/1% spandex FR twill Meets the performance requirements of NFPA 70E/ASTM F1506 UL® classified to NFPA 2112 Built to move with Rugged Flex stretch technology Triple-stitched main seams Button-down collar with FR melamine buttons Adjustable cuff with button closure Carhartt FR label sewn on left pocket flap; NFPA 2112/CAT 2 labels sewn on sleeve placket Two chest pockets with flaps and button closure Center back length (medium, regular length): 27 ½” Imported