Zip up the Under Armour Men's Coldgear Infrared Micro Jacket next time you're exploring a new mountain town. The polyester construction is fortified with a DWR finish to help repel any passing precipitation without sacrificing your much needed breathability. Under Armour strategically put the lightweight, breathable, and compressible synthetic PrimaLoft Silver in the body and sleeves to give you extra warmth where you need it most. Bulking up the heat even more, ColdGear Infrared technology utilizes a soft, thermo conductive inner coating that absorbs and retains the precious heat your body produces for all day toastiness on the hill. The MagZip front closure clicks and holds together for easy, struggle free zipping, while the ColdGear cuff inserts ensure the perfect fit.