Pick up an axe and embrace your inner Viking in the Patagonia Fjord Midweight Insulated Flannel Shirt, an instant classic that'll have you braving the fall chill with impunity. Patagonia starts with a shell of long-wearing 100% organic cotton, and adds 60 grams of Thermogreen® insulation to keep the heat flowing. Is it a shirt? A jacket? Truth is, you can use it as either, making the Fjord Midweight Insulatated Flannel the most versatile top in your closet.