Hammer Made Mens Medium Red Blue Plaid Button Up Long Sleeve The product is a Men's Medium Red Blue Plaid Button-Up Long Sleeve Shirt made by the brand Hammer. Made of cotton flannel fabric, this shirt features a collared neckline, spread collar style, and regular fit. The shirt is machine washable and suitable for casual occasions. With a classic theme and all-season features, this shirt is perfect for wearing in the winter, fall, and spring seasons.