How to choose the right mask


How to choose the correct mask to protect ourself from being infected? 
This question is the most important thing at this moment.While, there is too many kinds of masks and standards.

Mainly three cateloges:


Which one is we really need? 
Here below i will list clearly the detailed difference:


In a summary: Every kind of mask is useful but is for different use. And we can choose correct one when we use in different occasion.We can offer different masks,any needs can contact me.

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Post time: Mar-27-2020