For outstanding responsiveness and freedom of motion without sacrificing tactical utility, it has to be the 5.11 Stryke Rapid Short Sleeve Shirt. It features dual-fabric construction with two types of finishes: Teflon and wicking/odor control, for optimal comfort and protection. But no matter how high your heart rate goes or how much your body temperature rises, the permanently stitched creases are there to help keep your clean, professional look intact.