With the versatility to choose jacket, pant and vest sizes separately, suit separates, like this Traveler vest, offer a custom fit. It 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. Traveler Collection Tailored Fit Suit Separates Vest