The classic layered clothing system consists of three or more layers. Each of them has its specific function. For example, inner layers, also known as base layers, are designed to wick moisture away from the body, disperse it to prevent colds, and efficiently transport moisture to the outer surface of the garment. The second layer, called the middle layer, has one main function, which is to prevent the loss of body heat by trapping air and providing insulation, while the main task of the outer layer is to protect the other two layers from the elements. It is important to emphasize that sometimes this classification can be misleading. Remember, there are so many different circumstances and conditions, so take everything with a grain of salt. To be able to cope with changing conditions, don't be afraid to make adjustments (try mixing and matching various hiking clothing).