How to Wear Flannel. When we talk about casual and comfortable clothes that are also stylish the first thing that pops into the mind is a flannel outfit. Be it a guy or a girl, almost everybody has flannel apparel in his or her wardrobe. Winter Outfits, Lady, Casual, Casual Outfits, Nice, Outfits, Milan, Red Flannel Shirt, Red Flannel Shirt Outfit