Everything you need for maximum comfort is built into this training shirt. The HH® Cool fabric & Lifa® Stay Dry Technology pull heat & sweat away from your skin allowing you to maintain optimum body temperature throughout your activities. The half-zip at the chest is not only convenient for dressing but provides additional control of ventilation for optimum adaptation to climatic conditions. Sewn with flatlock stitching for a smooth look & feel inside & out. Curvy reflective stripes on the back increase your visibility during twilight workouts. Great outdoor clothing.