The EVO ColdGear Infrared Crew Shirt shirt is an ideal shirt for mild to cool hunts, or for cold hunts at high exertion levels. Featuring superior moisture management, the EVO ColdGear Infrared Crew Shirt will wick moisture away from your skin, keeping you dry, warm and focused. The 4-way stretch polyester blend material allows for a full range of motion and prevents muscle fatigue. ColdGear Infrared technology is a result of Under Armour using infrared imaging to research and pinpoint heat loss in insulation systems, in an effort to make their gear warmer. Stealth Bombers stay undetected by utilizing a high-tech ceramic coating that absorbs electromagnetic waves, keeping heat in, rather than dispersing it into the atmosphere. Mimicking this technology, Under Armour was able to create a flexible ceramic coating on the inside of the garment that holds heat better rather than dispersing it, keeping you in the field longer and increasing your chances at a big buck.