This is a lightweight fishing shirt from Columbia. It's thinner, very light and very comfortable. The only drawback is the somewhat rough material. That being said, this shirt is *different* from other competitors in the "fisherman shirt" market. There are cheaper alternatives, but there's a special twist to this Columbia shirt when it feels like it's made better. Additional Details: 1. Mesh lining covering the back of the shoulder blades.2. Mesh lining that outlines the front pockets.3. Canvas hook under right pocket. They have gone to great lengths to offer a higher build quality than the competition.