A ground rule is to wear such a piece with layers of clothing. It means that your clothing item needs to adjust over your body as well as the clothes. This means that it will be too tight to wear on the thick base layer if you buy a skin fitted item. As a result of which your body movements will be limited. At the same time, the piece must sit well with the base layers or shirt, leaving no gap for air to enter your body. Thus, it would be best to buy a jacket that is neither too tight nor too loose. Moreover, it must leave no gap between the inner and outer layers.