1 Touch your down jacket. If the fabric is thick, you can touch the side of the lining and seriously feel the fluff on your hands. High-quality down filler feels soft and does not contain any feathers, that is, it does not feel any foreign objects (such as feather stalks). If you can remember the above suggestions, you can quickly distinguish the quality of down jackets. For down jackets, the rule is never to buy inferior down jackets, except for poor warmth and bad smell, which will make you big and crazy. On the other hand, a good down jacket feels comfortable from the first time you wear it, and it will continue to recover for a long time. On the contrary, the resilience is poor, and those who have a foreign body feeling will be discounted. 2 Check the down/feather mixing ratio of the filler. The best filler is 100% down, because it is the lightest, warmest and most durable filler. Feathers, or those with a high proportion of feathers, are all discounted. The higher the proportion of feathers, the worse. The order of down is white goose down, gray goose down and white duck down. 3 pat the coat and check whether there is dust on the fluff on the cloth. Dust is a sign of poor cleaning of down, which directly affects the warmth and service life of down. Dust can also cause trouble to allergic patients, because it contains protein. Is there any fluff leaking from the clothes? If that's the case, it's best to hang this coat on the shelf and give it up, because the quality of this dress tends to get worse after use, and it's very likely that when you take off your coat, you will feel like you just came out of the farm. 5 Check the quality and function of the zipper. Zipper is a common accessory in down jacket, which is often used, so the quality of zipper is also very important, otherwise once it is broken, down jacket will lose its function of keeping out the cold. Generally speaking, YKK zipper is considered to be the best quality. Many big brands will use the zipper of this brand, and they usually have YKK logo on the zipper. 6 Check the washing instructions of the product. Good quality down jackets can stand machine washing and drying, which should be clearly marked on the clothes. Chemical cleaning is not the best solution in terms of the function and durability of down filler. So, read the washing instructions carefully, otherwise, improper handling may cause your down jacket to try to keep warm. 7 try on the upper body to find the feeling. A high-quality down jacket, when you wear it, it is easy to identify its qualities, such as lightness, comfort, ventilation and warmth.