Dr. Cool’s men's short sleeve moisture wicking shirt is constructed using a patented chemical-free cooling material designed by Coolcore to keep you comfortable for maximum performance. As you work up a sweat, it makes sweat work for you. The chemical-free moisture and sweat activated material delivers three distinct functions – wicking, moisture circulation, and regulated evaporation – to reduce the fabric’s surface temperature by up to 30%. And, because it’s chemical-free, the cooling benefit never washes out. Strategically placed mesh inserts help to add additional cooling and ventilation, making this the ideal men's cooling t-shirt.