T-shirts are divided into two types, depending on which category of underwear they belong to - underwear (put on under other clothes as an underwear layer) and upper (can be displayed, that is, not covered with any clothes). The former are also called undershirts, they can be worn under a shirt (top shirt), or under shoulder clothing (sweaters, jumpers, pullovers, sweatshirts, sweatshirts). From them originated the modern top tees, worn uncovered by other clothing, or in combination with something. Such T-shirts can contain inscriptions, patterns, images.