As the temperature gradually drops, there is a single product that will certainly be used more and more, and that is the "base layer". The bottom of the shirt can be said to be a safety card with clothing, it is basic and versatile, as long as the right choice, it is generally very difficult to wear wrong. So, our dressing problem also becomes how to pick the right " base layer ". Next, I will be from 4 selection directions to elaborate on the selection of bottom shirt points and learn both thin and good-looking.