The classic flannel has come a long with this Patagonia Men's Cotton in Conversion Fjord Flannel Long Sleeve Shirt. It has an iconic style with added sustainability. This durable shirt is constructed with 4.8-ounce 100% cotton, which is in the process of being certified organic. This sustainable material makes this shirt extra soft and lightweight, helping you stay warm and dry without added bulk. It features a button-collar pocket on the left chest with an easy-to-use flap closure. It has a shirttail hem that gives it style and versatility.