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June 09, 2021
Fabric: because the mask is directly in contact with the face and mouth, its air permeability, softness, flexibility and durability are the main factors that determine the use time of the mask. There is a direct relationship between the air permeability and the cleanliness of the mask. Only by ensuring the cleanliness of the mask, the mask can play its protective role and will not become a hotbed for bacteria breeding. And good flexibility, can avoid the face and fabric in the friction, produce itching, allergies and other phenomena, to a certain extent, can also extend the mask use time. For the flexibility and durability, it is more important to see whether the shape of the mask remains unchanged.
The deformation of a mask means it can't be used, and when it's sleeping.
The above is the Is the mask still valid? we have listed for you. You can submit the following form to obtain more industry information we provide for you.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.