Today, the comfort and functional research of outdoor clothing has been widely valued in various countries, the functional requirements of outdoor sports clothing are mainly wind proof, waterproof and moisture drainage, others also include moisture absorption and quick drying, antibacterial, anti-ultraviolet and so on.

Due to the development trend of multi-functional fabrics for outdoor clothing, any single natural or chemical fiber can not meet these requirements at the same time, only through a variety of fibers and different production techniques to try to make the fabric meet these functional requirements.

A good outdoor clothing should not only be rain proof but also breathable, and its breathability is determined by the microporous structure of the film, allowing gaseous water molecules to discharge and preventing liquid water molecules from entering. The ability of air to pass through the fabric is called the permeability of the fabric, which directly affects the wear performance of the fabric, the fabric used in summer clothing needs to have better permeability, and the fabric used in winter clothing should be less breathable to ensure that the clothing has good wind resistance and prevent the loss of heat.