In the north in November, a cold snap hit early, and the weather forecast indicates that the temperature will remain below freezing for the next week. Ms. Li looked out the window at the bleak scenery and couldn't help but worry about the coming midwinter. She has been working locally for several years and has long been accustomed to the cold of the north. However, what bothered her was that the down jacket she bought last season had a serious ball in less than a month, and the experience was extremely poor. 
Ms. Li still remembers that she chose the less famous down jacket brand because it was cheap. As a result, she didn't finish a season, and she could only laugh bitterly at her blindness in the first place. Thinking of the frequent exposure of inferior down jackets in recent years, Ms. Li can't help but feel a little weak. She worries that if she chooses the wrong down jacket again, she will not only waste money, but also face safety hazards in the cold period. This left Ms. Li in an anxious dilemma. She understands the importance of choosing the right down jacket, which is related to the warmth and health of herself and her family. But how to judge and how to choose the best quality, best quality and cheapest products, she obviously lacks experience. In order to choose the right down jacket, Ms. Li decided to first find out the country's clear regulations on her quality standards. She believes that this will be the most authoritative basis for judging the quality of down jackets. 
After careful inquiry, Ms. Li was pleased to find that the national standard has quite detailed and strict requirements for the quality of down jackets. This is also very friendly to ordinary consumers to judge and buy. For example, regarding the down content, the national standard clearly requires that it shall not be less than 50%. Ms. Li quickly calculated that this meant that at least half of the weight had to come from down. For better quality down jackets, this indicator is usually in 70-90%. The amount of down is also clearly defined, which is the total weight of the fluff used for the actual filling. Ms. Li learned that in the case of the same down content, the higher the filling amount, the better the warmth of the down jacket. 
In addition, the main parameter that reflects warmth is the fill power. This represents the volume of gas that can be fixed by the villi when compressed. Ms. Lee understands that high fill power means that the same weight of fluff can hold more gas molecules, which in turn improves warmth. Regarding fillers, the national standard also clearly stipulates that goose down is superior to duck down. Ms. Li noted the fact that goose down is lighter and fluffier. She began to have the confidence to judge the quality of down jackets by the parameters of national standards. After clarifying the parameters of the national quality standards, Ms. Li specially learned the four rapid detection methods of "looking, pressing, patting, and smelling" in order to better judge the actual quality of down jackets. "Look" is actually based on the overall level of workmanship. Ms. Li pays attention to whether the thread is neat and symmetrical, and whether there are sharp parts that are easy to scratch the decorative parts. 
Whether the design of the neckline and cuffs is reasonable or not is related to the quality of the product and the comfort of wearing. "Compression" is an easy way to test the elasticity and fluffiness of a filler. Ms. Li can gently press the down jacket to see if its thickness and shape can recover quickly. This is closely related to the fluffiness and the quality of the knitted fabric. The focus of the "pat" method is to check whether the anti-drilling pile treatment is appropriate. Ms. Li will pat various parts of the down jacket with the palm of her hand to see how well it pills and removes her hair. Reasonable anti-drilling treatment can greatly extend the service life, which Ms. Li keeps in mind. 
Finally, "smelling" may seem simple, but it is extremely important. Ms. Li should carefully sniff for the presence of peculiar smells, which is related to the hygiene and storage conditions of the filler. Qualified down jackets must be free of any pungent or unpleasant odors. After purchasing her favorite down jacket after layers of screening, Ms. Li understands that maintenance and use are equally important, otherwise even the best products will not be able to exert the desired warmth effect. The first priority is never machine washable. Ms. Li remembered that the fast-spinning drum and strong dehydration could cause the down jacket to swell and gather densely, eventually leading to "proper washing can only be done by hand washing or natural drying." 
Secondly, it is necessary to pay attention to avoid excessive static electricity in down jackets, especially in combustible environments such as some gas stations. Ms. Li knew that if the down jacket was overstatic, it could cause sparks to ignite the flammable gas. Therefore, before going out and refueling, they will deliberately slap their clothes to release static electricity. In addition, for Ms. Li, who has children at home, it is also important to get the baby dressed correctly. She taught the baby to dry his hands after washing his hands and playing, so as to avoid greater static electricity caused by friction with clothes. Children should also pay attention to the restraint of seat belts when driving a car, so as to avoid the impact of fluffy down jackets on safety. 
Ms. Li believes that as long as she strictly implements and develops good maintenance habits, she will be able to keep her down jacket warm and safe for a long time. Let her and her family have a warm, comfortable and reassuring high-quality life in the cold winter. Through Ms. Li's selection and use experience, we can summarize the key suggestions for scientific purchase and maintenance of down jackets, aiming to help consumers avoid various potential risks in the process of purchase and use. First of all, we must be clear about the quality parameters of down jackets in national standards, such as down content, filling capacity, fluffiness and other indicators should be the first element to judge whether a down jacket is of high quality. This is the most authoritative basis for quality judgment. 
Secondly, simple detection methods such as "four ** rules" are used to quickly judge the appearance and workmanship of the product, the elasticity of the filler, pilling and odor, etc., which can effectively identify inferior down jackets. This is also an important part of avoiding the risk of purchasing. Finally, after buying a down jacket, we must also develop the correct maintenance and use habits. No machine washing, avoiding static environments, and ensuring that children wear them correctly are all key. Only reasonable maintenance and use can give full play to the due warmth effect and safety. 
I hope that through Ms. Li's sharing, we can help more consumers scientifically judge and choose down jackets. Avoid the endless inferior products on the market, and buy cost-effective products with high quality and low price. Let everyone have a warm and comfortable winter.