Polypropylene fiber is made from the polymerization of hydrocarbon elements. At room temperature, it is resistant to acid, alkali, oil, chlorine and alcohol solution, and has excellent skin affinity. More 360° four-sided flexibility, woven in the clothing layer, wearing no foreign body feeling, extra comfortable. Polypropylene fiber can be completely decomposed naturally, no harmful substances will be produced after the combustion of hydrocarbon elements, and its color is colored by the stock solution (that is, the color master melt spinning), making the fiber's washing color fastness and daylight color fastness are very good, and the color fastness is unmatched by other dyeing fibers. It also avoids pollution emissions from dyeing and is extremely environmentally friendly, in line with current international trends, and is highly regarded as an environmentally friendly fiber.