Built in a 7-ounce twill in an 88% cotton/12% high tenacity nylon blend, Carhartt's Women's Flame-Resistant Twill Shirt protects against flash fire or electric arcs. It features flame-resistant melamine buttons up front, plus extended sleeves with adjustable, two-button cuffs. There are double-stitched main seams, and two chest pockets with flaps and button closures. The shirt is NFPA 70E compliant.