The factors to consider are dry temperature, humid temperature, air displacement and radiant temperature. The first factor is further discussed. Sometimes chilly, sometimes warm, the temperature at which people are comfortable is unique to each. Humid temperature has a lot of influence on children and some adults, especially during a strong winter flu. Displacement of air is the most bothersome of factors, as it makes everyone uncomfortable. No one enjoys a draft in a restaurant. The radiant temperature is the least known, but nevertheless the most comforting, think of the spring sun, the wood stove after a day of winter sports.