Filson Twin Lakes Short Sleeve Sport Shirt Gray / Blue / CreamFilson Twin Lakes Short Sleeve Sport Shirt in Gray Blue Cream. A favourite for warm weather action. The Twin Lakes features slight stretch built in for complete freedom of motion, whether casting dry flies in high desert streams, hiking into alpine lakes, or poling a skiff across the tide flats. The polyester blend fabric wicks moisture away from the body, dries quickly, and blocks harmful UV rays. Chest pockets are covered with buttoning flaps for