Flannel shirts have always been closely linked with the fall. If your own wardrobe currently lacks a cozy, brushed flannel, you can easily remedy that here. Instead, I’m here to report that this summer of 2026, I’m seeing dry cotton, plaid-patterned shirts appearing on stylish guys during the peak of an entirely different season. There’s just one problem: Far fewer designers make the breezier, less-cozy versions I'm talking about. So I spent the last few hours pulling the best options from the ones that do.