104507 Carhartt Men's Flame Resistant Force Rugged Flex Loose Fit Midweight Twill Plaid Shirt Beat the heat with a flare of style and comfort with this flame resistant plaid shirt. Carhartt's FR technology will keep you safe while their other features will help you feel secure. Whew... that's hot! Loose Fit Meets the performance requirements of NFPA 70E and ASTM F1506 UL classified to NFPA 2112 Carhartt FR label sewn-on left pocket; NFPA 2112/CAT 2 label sewn-on sleeve placket Built with Force technology to wick sweat and dry fast FastDry technology keeps you cool for all day comfort Built to move with Rugged Flex stretch technology Button-down collar with button closure Extended sleeve plackets with two-button adjustable cuffs Two chest pockets with button closures Fabric 75% cotton 20% polyethylene vinyl acetate 5% para aramid FR twill