How should I choose and buy Zimi masks if it's my first time trying them?

When purchasing for the first time, you can choose some individually packaged masks for testing and trial use. For example, size M (9541) and size L (8210) are commonly used adult sizes. XXS sizes (95W and 95S) are commonly used for younger children, S size (7711) is commonly used for small adults and older children, and there is also an extra-large adult size XL (B95-XL). Once you find the right size, you can keep the mask frame and use it when you purchase filter cartridges next time. All filter cartridge models end with "F". Same size means the same frame; all models and filters of the same size are compatible.

Are gray or blue fabrics breathable?

They are multi-layered composite materials that prevent air from passing through, contain no fluorescent agents, and meet China's Class A safety requirements for infant and toddler products. If you're interested, you can blow air forcefully into the sealing fabric; it won't allow air to pass through.

When you look at the welding points of a black mask in the light, there is a little light that can pass through. Why is that?

After being ultrasonically welded, the black fibers are compressed, resulting in uneven material density and color distribution. This causes them to appear slightly translucent when viewed against the light, but it is not actually a sign of material damage.

The wearing time, number of times of use？

The wearing time of protective masks should be determined by the wearer. When the mask structure collapses, breaks, or the internal contaminated particles are encountered during wearing, and the breathing resistance increases, it should be considered that it needs to be replaced. This time is not fixed. Or when the use environment is polluted by ordinary particles, there is no such problems as structural collapse, breakage, internal contaminated particles, and increased breathing resistance. The protective mask can be dried or quickly air-dried before continuing to use. This is called cumulative disposable use. It is recommended that the cumulative wearing time should not exceed 30 hours (about 3-4 days). Because everyone's use environment, usage method, and disinfection method are different.”
The wearer needs to decide when to replace it in the end; the increase in breathing resistance is considered to be the replacement point of a mask life, which means that the internal filter material is blocked by particles/water vapor, which causes the resistance to increase, which will affect the wearer's breathing. If the protective mask is used in a virus aerosol particle environment, it is recommended to wear the mask and take off the mask as a cycle, and one mask for one cycle. Viruses and bacteria are also a type of particle. In addition, if the mask is worn for a long time, the surface layer is too dirty or the internal filter material begins to turn gray and black, it is also recommended to replace it. However, when going to hospitals or high-risk environments, use KN95 or medical protective masks as disposable.

Disinfection method

The mask can be disinfected by standing, hypochlorous acid, ultraviolet light, ozone and other disinfection methods, and then reused. The specific number of uses depends on the individual.