T-shirt is the Chinese translation of English "T-shirt", so it is named because of its T-shape. The structural design of T-shirts is simple, and the changes of styles are usually in neckline, hem, cuffs, color, pattern, fabric and shape. T-shirts are divided into three forms: sleeve type, vest type and open abdomen type. T-shirts are the most active items in summer clothes, which can be freely matched from home clothes to popular clothes. As long as you choose the bottoms with the same style, you can wear popular styles and different moods. In spring and summer, when gaudy T-shirts float like clouds in the street, who would have thought that T-shirts were originally underwear worn by workers who did heavy manual work? Generally speaking, men's T-shirts are a bit like women's bras now, which are not easy to expose. Only when they put on sleeveless jumpsuits will they show some true colors. At the beginning of the 20th century, T-shirts were only promoted as underwear in the product catalogs of clothing companies. By 1930, although the image of underwear has not changed much, it is obvious that people have begun to try to wear T-shirts outside, which is what we hear as "sailor shirts". Sailors set sail in T-shirts, and the blue ocean and clear sky painted it with the first romantic color.