A man or woman's closet must still include an aviator jacket, the epitome of timeless and traditional fashion. This clothing was originally designed to shield Air Force personnel from the chill in the cockpit. They decide to use leather as their main material for this purpose. In addition, Pilot Leather Jacket timeless classic appearance makes it possible to achieve greater insulation at a lower cost. But as technology advanced, altitude rose, and sheepskin replaced the lining to more effectively capture internal heat.