Patagonia Lightweight Insulated Fjord Flannel Shirt pairs classic flannel styling with lightweight Thermogreen™ insulation for added warmth. Designed to work as a shirt or a light jacket, it balances everyday style with practical cold-weather performance. Key attributes: Old growth green | Cotton | Light insulation for warmth | Durable water-repellent (DWR) finish | Quilted lining for added heat retention | Adjustable button cuffs | Two chest pockets with button-closure flaps | Side-entry handwarmer pockets | Full-length button-front placket | Pointed collar | Shirttail hem | Shirt-jacket silhouette | Quilted interior lining | Dimensions & fit: Regular fit | Can be worn as a mid-layer or light jacket | Model height 1.90 m, wearing size M | Composition & care: Body: 100% cotton (brushed flannel) | Lining: 100% polyester (taffeta) | Insulation: Thermogreen polyester, 80 g | Machine wash cold. Do not bleach. Tumble dry low. Do not iron.