Product Information for 5.11 Tactical Product Description Patrol Duty Uniform® is made from a poly/cotton blend and features a PTFE Resin finish for stain and soil resistance. Each shirt comes with epaulettes, badge tab, bi-swing shoulders for full range of motion, permanent creases, and a front zippered front. PDU shirts also include armpit vents, a mic-cord pass-through and adjustable cuffs.