Ditch the thermostat, wear your personal comfort zone. This dress shirt, powered by 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. Look sharp, feel comfortable, conquer any climate.