The Vintage Flannel Work Shirt is a midweight, double-needle cotton plaid shirt in Filson's thickest brushed twill. A seriously durable but comfy shirt for everyday wear. Product Information: 100% cotton twill Flannel plaid shirt Pleated back for a full range of motion Military-grade melamine buttons Two flap pockets Button-adjustable cuffs Brushed twill interior Flame / Cream / Black Plaid