Faster is better. With the fastest moisture transport performance in the world, Wick.Q fabric regulates body temperature on warm and cool weather runs. Stretch mesh panels give you more venting and provide a closer fit. Poly/polypro plaited fabric to rapidly move moisture. Stretch mesh strategically placed for venting and close fit. Flat-lock seam construction eliminates chafe. Antimicrobial finish controls odor. Reflective trim for visibility.