A company grounded in authenticity, Under Armour clothing evokes power and strength. The innovative technology behind UA success is complex, but the rules for the clothes are simple: Wear HeatGear® when it's hot, ColdGear® when it's cold, and AllSeasonGear® between the extremes.  Each piece of apparel is meant for extreme conditions; engineered to keep athletes cool, dry and light throughout the course of a game, practice or workout. In the coldest winters, envelope your body in a ColdGear shirt and hit the slopes. Run in Under Armour's popular Frosty Tights. And those infamous tv ads? They live up to their claims.