Keep warm and dry with the Under Armour ColdGear Infrared EVO half-zip mock. This long-sleeve shirt is designed with superior moisture management technology which will wick away sweat even during your hardest workouts. ColdGear Infrared technology is derived from military stealth bombers which use a high-tech ceramic coating to go undetected. This is achieved on this shirt by a flexible ceramic coating inside of the shirt; it holds in heat rather than dispersing it and will allow you to stay warm in even the coldest temperatures. In addition to its heat technology, the Under Armour ColdGear Infrared EVO half-zip mock shirt includes UA’s signature four-way stretch polyester blend material which allows for a full range of motion and prevents muscle fatigue.