ColdGear Reactor is intelligent insulation that adapts to your activity level for the right breathability & warmth for what you're doing. Fabric has soft, brushed "nodes" next-to-skin for the right warmth that breathes as you move. Material wicks sweat & dries really fast. Exposed elastic waistband with wordmark detail. Under Armour's mission is to make all athletes better through passion, design and the relentless pursuit of innovation.