Cockpit USA Men's CPO Shirt Olive or NavyFirst issued in the 1930s for U. S. Navy Chief Petty Officers, the CPO Shirt quickly became one of the most relied upon cold weather garments in naval history. Built from heavy wool and designed for durability at sea, it was worn not only by Chief Petty Officers but by sailors across the fleetmany of whom continued using their issued CPO shirts long after WWII. Cockpit USA proudly recreates this American classic with an emphasis on authenticity and