This Traveler dress shirt features a unique fabric technology that maintains the optimum microclimate for your body. Featuring 37. 5copy Technology, maintains the optimum microclimate for your body. 37. 5copy 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. Traveler Collection Tailored Fit Button-Down Collar Dress Shirt