Track and field clothes are mainly made of "nylon fiber" fabrics, and there are also pure cotton fabrics, such as health care cloth, big terry cloth and fish scale cloth, which belong to sportswear fabrics. Judging from the best-selling sportswear on the market at present, both international and domestic brands are pursuing fabrics with excellent moisture absorption and perspiration performance. This kind of fabrics are basically chemical fiber products, most of which are polyester. At present, CoolMax, CoolBST and so on are common in the market, but the basic principles are similar. By increasing the capillary action of the fiber itself, the sweat on the surface of the human body can quickly spread through the clothes and evaporate into the air without staying on the skin, keeping the clothes dry and making people feel comfortable.
In addition to moisture absorption and perspiration performance, another reason for choosing chemical fiber fabric for sportswear is that this special cross-section chemical fiber fabric is not easy to fit. When the chemical fiber is processed into a special-shaped section, its own bending modulus increases, and it is not easy to cling to the skin after moisture absorption, and it will not make people feel wet. However, cotton fiber has a small modulus in wet state and is easy to fit. Of course, when the clothes are worn next to the body, as long as the human body sweats less, the comfort of cotton fiber is much better than that of conventional synthetic fiber.