If you want to find it, you can't just post it online and wait. That won't do. You must work hard. American Puweixin recommended: 1, with good filterability: the filtration efficiency is 99.8% for particles as small as 0. 1 micron, and 99.9% for bacteria or virus carriers as small as 0.3 micron (common in droplets). 2, good fit and comfort: the aluminum strip is soft, super easy to adjust, fits the nose and chin, and does not hold your breath. The ear hook is also very comfortable and won't hurt like a rubber band. 3, ultrasonic bonding, pure white cover, no smell at all. 4, anti-fog glasses: Every time I go outdoors for half an hour, six times, the mask is already slightly wet, but the glasses really don't fog at all. 5. Anti-facial allergy: The inner layer of Puweixin mask is made of pure white ultra-soft anti-allergic cellulose, which does not contain dyes, inks and chemicals, and is not irritating, not easy to break, and protects sensitive skin. There's one in J'd!