Warm, comfortable flannel shirt in high quality wool blend. Can be worn both as a middle layer under a jacket or by itself as a lightweight jacket. It is easy to regulate the warmth based on the activity â unbutton or button up, roll up or down the sleeves. Push buttons in the front, on the sleeve cuffs and on the pockets. A smart extra button at the collar means that you can fold up the collar and protect your neck when the wind is sharp. Two breast pockets with flaps. Materials: Wool, Cotton, Polyester. Outer material: 60% Wool, 30% polyester, 5% polyamide, 5% other fibers. Material: Wool.