When buying vests and sweatshirts, you should choose something bigger than yourself. Generally speaking, it is 5 cm larger, because it is not easy to stick to the body if it is wider. When washing vests and undershirts, do not soak them in hot water, but scrub them with a hard brush and washboard to prevent the clothes from yellowing due to broken wires and protein solidification in sweat.

In addition, you should also be careful not to rub or twist hard, especially rayon undershirts, because the firmness of rayon undershirts after soaking is only half that of dry undershirts. If the clothes are twisted too dry, or pulled at will when drying, the clothes will be deformed.