Forget stuffy dress shirts, this one breathes with you. Featuring 37.5© Technology, maintains the optimum microclimate for your body. 37.5© Technology removes moisture at the vapor stage before sweat can form. 37.5 Technology also acts like a thermostat by removing moisture when you are hot and retaining warmth when cold. It absorbs and traps odor molecules that are washed away when cleaned. This wrinkle-resistant wonder shirt lets you focus on what matters, knowing you'll look and feel your best, no matter the temperature.