Rothco's Extra Heavyweight Buffalo Plaid Sherpa Lined Flannel Shirts are designed for maximum warmth and comfort. With a heavyweight flannel outer shell and light grey sherpa lining, these shirts provide superior insulation to keep you cozy all day long. Additionally, the insulated quilted taffeta sleeve lining adds an extra layer of warmth. This versatile wardrobe piece can be worn as a jacket, light layer, or just as a shirt, making it suitable for various outdoor occasions.