Flame-Resistant Lightweight Twill Shirt 6-ounce, 88% cotton / 12% high-tenacity nylon FR twill Meets the performance requirements of NFPA 70E UL® classified to NFPA 2112 Button-down collar and front; Flame-resistant melamine buttons Carhartt FR label sewn on left pocket; NFPA 2112/CAT 2 label sewn on sleeve placket Extended sleeve plackets with two-button adjustable cuffs Two chest pockets with flaps and button closures Imported