Engineered with direct input from law enforcement and tactical operators from around the world, the PDU rapid shirt from 5.11 Tactical is an innovative new design that perfectly complements the use of an external vest carrier. Featuring a unique dual fabric construction, the upper body portion of the PDU rapid shirt is built from a tough, durable, extra-thick polyester, cotton fabric that supports the weight of your external carrier comfortably and completely. Below the shoulders, the PDU rapid shirt incorporates a polyester, cotton, spandex performance knit fabric that offers enhanced mobility for full freedom of movement, as well as moisture wicking characteristics that keep you cool, dry, and focused during demanding tactical situations. If you use an external vest carrier, the PDU rapid shirt from 5.11 gives you the speed, agility, and performance you need to overcome any obstacle. Material: Polyester, Cotton.