The new Under Armour CompressionColdGear Crew Top from Under Armour is a great training top offering an amazing fit, and with the added benefit of Under Armours 'ColdGear' technology, this top also makes a fabulous baselayer for colder weather. The Aggression ColdGear top is designed to regulate body and skin temperature in almost any condition, while allowing your skin to breath by drawing moisture away from the surface and out through the fabric.