1、 Masks should be three-dimensional: First, exclude those flat medical masks and gauze masks, and secondly, flat filter masks. Only the three-dimensional design is more in line with the human face; in addition, Wu Tangchun, Dean of the School of Public Health, Tongji Medical College, Huazhong University of Science and Technology (National "Basic Research on Health Hazards Caused by Air Particulates" Project **Expert) said that 3M masks , It is just a simple imported product, the structural design does not fit the Chinese face at all, and it is definitely uncomfortable and unsightly to wear.
2. Description of the filtering effect: Here we must pay attention to the purchase channel and product packaging. First, we must choose the formal channel of the pharmacy, because the text content written on the packaging after their screening is all certified and reliable; Whether the packaging has passed the GB2626 test instructions, if there is, it proves that the filtering effect is indeed passed.
3. Masks are needed: This is probably a question that most consumers ignore. Are the masks we wear really hygienic? The masks are worn from the production line to the packaging, and then to unpacking. If there is no intermediate link, then there is no guarantee Masks are truly clean. Unlike clothes, masks directly touch the oral and nasal cavities, so hygiene is very important. So how to judge, the simple way is to see whether each mask has an independent packaging, and secondly, to see the product packaging text in the pharmacy. After that, do not choose all kinds of fancy and cute masks on the market as anti-haze products. This type of product is only designed for beauty and warmth, and does not have the function of anti-haze.