In textiles, the market for sportswear and casual wear has always been a leader in other products, and it is widely favored by consumers. Especially in recent years, products that emphasize functionality are well received, but only true experts understand. The meaning of functional sportswear, such as malti-layer, onino-skin, etc., consumers need to know the true wearing function, then the professional should provide the correct message. Since 1994, many companies have successfully developed a range of functional fabrics based on fiber properties, such as Tactal, GORE-TEX, Lycra, Polortec fleece, etc., each with its own end-use needs, each with its own place in the market. . Also let the fiber company know that the whole "fabric system", the end use is the fabric, not the fiber itself. This kind of cognition, together with the pyramid-shaped market distribution, will prompt the manufacturers to actively develop new fibers towards the top goal.