Under Armour Men UA Storm ColdGear&reg; Infrared Run Jacket UA Storm gear uses a DWR finish to repel water without sacrificing breathability Windproof 3-layer bonded body fabric with a durable, smooth outside & a soft interior 4-way stretch ColdGear back panel traps warmth & allows greater mobility Back flap provides strategic ventilation. Graphics, zips & logos are reflective for greater visibility on low-light runs. Articulated elbow seams for chafe-free comfort. Embossed chest panel.