Constructed of 100% micro polyester smooth face-fleeced back fabric with ec2® Qwik-Dri™ Thermoregulation Comfort Technology. * Lightweight, breathable, non-pill fleece has an excellent warmth-to-weight ratio, provides a thermal barrier for extra warmth. * Fleece construction effectively transports moisture away from skin for quick evaporation. * Anti-microbial treatment for odor control. * Wicking elastic waistband.