Filson's lightest-weight flannel shirt, made with 4 oz. cotton flannel and cut with a trim fit. With its breathable, light weight and broken-in feel, this flannel has quickly become one of our most in-demand shirts. Designed with multiple color options inspired by classic and vintage flannels rigorously sourced by the Filson design team. The Scout Shirt is an ideal layering and transitional piece when it's too cool for a t-shirt and too hot for a thicker flannel. Pre-washed to eliminate shrinkage and maximize comfort. 100 percent yarn-dyed cotton fabric. Cut trimmer to the body.