Flannel is the fabric that autumn was invented for and the flannel shirt is one of those seasonal pieces we genuinely look forward to getting back to when the temperature drops enough to justify it. There’s something about the weight and softness of a good flannel that feels like the sartorial equivalent of your first cup of coffee on a cold morning. We love a classic plaid flannel worn open as a layer over a plain tee with jeans and work boots for exactly the uncomplicated autumn look it’s been delivering reliably for decades. The trick with flannel is not overcomplicating things around it. The shirt is doing enough and adding a lot of competing elements tends to make the overall look feel busy rather than considered. Keep it simple and let the fabric and the pattern do the work.