Carhartt's flame-resistant twill shirt with pocket flaps works as hard as you do, made of 7-ounce, flame-resistant twill, it features two chest pockets with flaps and button closures, flame-resistant melamine buttons and a button-down collar, It also has triple-stitched main seams and a shaped shirt tail* 7-ounce, FR twill: 88% cotton/12% high-tenacity nylon* Loose Fit (formerly known as Original Fit) - Loose and Original labeling is a change in name only, sizing/fit does not differ. Stock may vary in labeling.* Two chest pockets with flaps and button closure* Extended sleeve plackets with two-button adjustable cuffs* FR melamine buttons throughout* Button-down collar band with button closure* Triple-stitched main seams* Carhartt FR and CAT 2 labels sewn on left pocket* Meets the performance requirements of NFPA 70E and is UL'àö√ᬨ√Ü Classified to NFPA 2112* CAT - 2* ATPV(CAL/CM2) - 8.6