Men's Fjallraven Stig Flannel Shirt in Autumn Leaf size M Gorpcore Quiet Luxury Lightweight and warm long-sleeved trekking shirt with button-down collar and slim fit. Made from functional polyester flannel that insulates well, transports moisture away from the skin and dries fast. This makes the shirt perfect for high-intensity activities all year round, either as a base layer against the skin or as an insulating middle layer over a base layer. One open chest pocket. Materials: 100% polyester