The Grundens Steelhead Flannel is specifically designed for cold weather fishing and is made of durable 180-gram polyester. The fabric is lightweight, allowing you to move freely without feeling weighed down. It features moisture-wicking technology, which draws sweat away from your skin, keeping you dry and comfortable throughout your fishing trip. It also has quick-dry technology, which helps the shirt dry quickly if it gets wet, so you don’t have to worry about feeling damp or uncomfortable for long periods.