Our Vintage Flannel Work Shirt has been a favorite of Filson employees and customers alike since its 2015 introduction. Built with thick and breathable cotton flannel, it's ideal for cold weather. The fabric is heavily brushed for outstanding softness and thermal retention. Dual shoulder pleats on the back yoke provide unrestricted range of motion for working overhead, casting a fly rod, or shouldering a shotgun. Virtually unbreakable buttons are used for the front closure and adjustable cuffs to ensure long-term durable service.