It is very simple, just take two tops and put them on.....LOL. That statement is neither true nor false as not all tops compliment each other. The summer top I have under my sweater is sleeveless and being that layers are trending this fall I wanted to find a way to still wear it. Usually you would put a button up blouse under a sweater, but that is not the only way to layer your items. The first layer should either be longer than the top layer or have some sort of collar you want to show. The top layer should simply compliment the other shirt. Yes It Is That Simple!!!