Sportswear coats are generally divided into casual suit tops and lightweight tops. The traditional and most comfortable styles are two or three buttons. If you want to be tighter, you should choose a button or a four button. People who are too tall or too short are not suitable for wearing casual shirts with patterned or tartan; they are too conspicuous. A medium-sized man wearing a plaid shirt will not be too ugly, but the basic principle of choosing such a coat should be simple color and simple style. Strictly speaking, there is a difference between a lightweight top and a casual suit top. The main difference now is that the color-lightweight tops are usually monochromatic, the common ones are black and blue; the casual suit tops are more diverse in color, or they can be patterned or plaid.