Our Chambray CPO Shirt is a lightweight cotton take on the heavy wool shirt worn by vintage U.S. Navy senior enlisted men. The tough chambray fabric stands up to abuse on the job in a weight that's comfortable year-round. Garment-washed for shrinkage control and comfort from the first day. Button-secure chest pockets, with utility/tool slots in left pocket. Pleated shoulders for ease of motion. Chip-resistant melamine buttons.