As fall approaches, we’re looking to stock up on style staples that can help us transition between the seasons. Enter, the trusty flannel. We’ve rounded up the best flannel shirts for men under $100 that can be thrown on over a t-shirt on cooler evenings, worn alone, or layered under a jacket as the temperatures drop. These essential shirts are soft, cozy, and allow you to live out your mountain man fantasy. Scroll down to see the options our editors will be wearing this fall.