You probably have a bunch of button-front shirts in your closet, but the best flannel shirts for men offer something that the others match: sheer coziness. Which means you could actually wear flannel every day of the week if you wanted to. When we talk about flannel shirts, we’re usually talking about the colorful plaid variety beloved by ‘90s grunge rockers, suburban dads, and off-grid survivalists alike. As indisputably classic as these tartans are, however, they’re not your only option when it comes to a great flannel shirt. Buck Mason’s CPO may not be the flannel you imagined, but it will be the one you pull on every day.