The Under Armour Flats Guide II Shirt is just the most awesome fishing shirt ever produced. Sewn from extremely lightweight polyester fabric, this shirt is quite possibly the lightest shirt you will ever wear in the boat or along the shoreline. And, the Flats Guide II Shirt with its strategically located back vent, SPF 30+ sun protection, and quick dry - moisture management, is designed and constructed for all day comfort. The anti-odor technology makes for a more comfortable day for you and crew and the fabric is designed to release sweat and stains to stay looking new trip after trip. On the chest you'll find a vertical zip pocket and a horizontal zip pocket that keep sun glasses, fishing licenses and other valuables at hand but safely secured. The fit is loose and allows for improved range of motion. The elbow tabs on the long sleeve model secure the sleeves when rolled up.