The materials of down jackets are mainly down and coated fabrics.

①Down: A mixture of small feathers and down (also called velvet). The former is called feather and the latter is called down. The feathers of duck and goose are mostly used, and the small feathers and down are separated by washing and used as the flock of the down jacket. There are two kinds of down, gray and white, the white one is better. The quality of down jackets is related to the amount of down filling and down content. The amount of down filling refers to the weight of down that is flocked into a down jacket, expressed in grams, generally about 250 grams. The amount of down filling is small and the warmth retention is poor; the down content refers to the content of down in the down, expressed in percentages, and the general down content is the amount of down. 50% to 80%. The higher the cashmere content, the better the quality. Because the velvet can make the body heat not easily lost, and the hand feels soft, but it is not easy to bulge in time when it is pressed and wet, and the small feathers can make the clothes fluffy and bulge at this time to keep more air in the clothes. Helps keep warm, but there are too many small feathers, the heat is easy to dissipate, and there is a sense of stalk. So down and small feathers must be eclectic and proportional.

②The coated fabric is made of silk, cotton, cotton polyester and other fabrics with high warp and weft yarns. After rolling and pressing, the gap between the warp and weft yarns is reduced, and then coated with polymer slurry to form a transparent film interlinked with the fabric. The cover layer is used to close the warp and weft gap of the fabric, and fluorine-phosphorus resin or silicone waterproofing agent is added to the coating slurry to make the fabric have the properties of anti-dew velvet and anti-water seepage. Comfortable.