Columbia-Men's Gray Omni-Freeze T-Shirt

Columbia grey T-shirt with the omni-freeze technology. Omni-Freeze Zero is a sweat-activated cooling fabric technology that uses small blue rings to accelerate moisture wicking and evaporation, which in turn lowers the temperature of the fabric and helps the wearer stay cool. When sweat touches the fabric, the blue rings react to draw heat away from the body, making the material feel cooler and the wearer more comfortable during physical activity.