. . Engineered with input from operators in the field, the 5.11® Class B PDU® Stryke Shirt takes high performance uniform wear to the next level. Designed to. . stand up to consistent use in harsh duty environments, the Class B PDU Stryke Shirt is crafted from our proprietary 4.84 oz. Flex-Tac® mechanical stretch. . fabric for outstanding durability and breathable comfort throughout your shift. A Teflon® treatment offers enhanced resistance against stains, spills, and. . soil, sewn-in military creases and a hidden front zip closure ensure a crisp, professional appearance, and our trademark 5.11 Hidden Document Pockets offer. . ample covert storage space. Additional features include a mic pass through access and camera/radio loop enforcement kit, an epaulette kit, and an. . integrated badge tab.. . Superior durability, breathable comfort. . Permanent creases ensure clean lines. . Teflon treatment for stain, soil, and moisture resistance. . 5.11 Hidden Document Pockets. . Hidden front zip closure. . Pass-through mic access. . Integrated badge tab. . Camera/radio loop enforcement kit. . Epaulette kit. . 4.84 oz. Flex-Tac mechanical stretch fabric. . Triple needle stitching. . Reinforced bartacking at major stress points. . Melamine buttons won't melt, burn, or crack. .