A thin and soft brushed back denim CPO shirt. CPO stands for Chief Petty Officer, and its name comes from the shirt that the US Navy provided. This exquisitely seasoned item, like between a shirt and jacket, has hand warmer pockets on the sides. The brushed back fabric is soft and warm and is a perfect layer in the cold windy season. It is a moderately loose silhouette. In addition, since it is woven using indigo rope-dyed threads, you'll love the way it ages with use and wear.