Under Armour Men's UA ColdGear Armour Stretch189; Zip Moisture Transport System - Under Armour's signature Moisture Transport System wicks moister from your skin, keeping you dry and your body temperature consistent in any condition Strategic Ventiliation - Strategic venting built into garment at key points where body heat is generated making sure you don't overheat. It also keeps athlete cool in extreme heat conditions. UV Protection - Helps protect the skin from harmful UV rays. ArmourBlock Anti-Odor Technology - This special fabrics in reduces the chance of bacteria forming and limits odour. Armour Stretch - A Lightweight fabrics with 4 way stretch helps increases mobilty and drying time.