Cotton and THERMOLITE polyester blended heavyweight flannel. THERMOLITE technology for permanent warming, moisture-wicking, quick-dry performance. Flannel is double brushed for comfort and warmth. Adjustable button cuffs. Double needle flat-felled seams for durability. Articulated sleeves for freedom of movement. The Alderson Midweight Flannel Shirt is purpose-built for your everyday lifestyle with comfortable, performance fabrics and durable construction. More than just a regular cotton flannel, this men’s shirt includes articulated sleeves and moisture-wicking quick-dry performance fabrics for long days outside.