How to revert my level 2 mask and what should I pay attention to?

Imagine having two masks in one!

That's right, the LA Mask has a level 2 mask model that is reversible. This means that you have to select, before using the mask, the layer you want to be on the outside. But be careful, it is not advisable to reverse the mask during its use. 

This mask is considered reversible before each use and after each wash.

You must never reverse the mask during its use under risk of contamination.

Source: DGS