Humans have adopted clothes for protection. They are adaptable to circumstances. We can layer them to fit the environment or weather. Society has created all sorts of ‘rules’ for when and where to wear certain items of clothing. We don't wear white after Labor Day. We don't wear jogging shorts to a formal wedding. Yet the layering process remains flexible. On a fall day, we may put on a sleeveless vest or short-sleeved tee atop a long-sleeved shirt; as the sun climbs, we’ll peel off the lighter item and keep on the long sleeves to ward off the chill.