Woven with a fine windowpane design, this Traveler Collection sportcoat features a unique fabric technology that maintains the optimum microclimate for your body. Named 37.5, it removes moisture at the vapor stage before sweat can form. 37.5 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. 66% wool 30% 37.5 polyester 4% spandex 37.5 patented technology Moisture odor control Performance with style Technology woven into fabric Tailored fit