I am very satisfied with the mask. However, if you have a large head, the elastic it has is not convenient. You need to cut it so that it doesn't squeeze you.

For those who have a larger face, it does NOT fit because it keeps sliding down and does NOT fit properly. I recommend it for women and teenagers.

This mask and generally masks with a valve are for use only by hospital personnel and only within the hospital. It is not suitable for use outside because we risk spreading bacteria from the valve and possibly receiving bacteria due to incorrect application. Get an N95 if you want better protection.

The mask is huge, resulting in a large gap under the chin and not fitting well at all. Money wasted!

The mask is simply unbeatable. Velvet, comfortable...
You breathe clean air.
... and at a very good price.
If you wear it for the first time, you think it doesn't fit well under the chin, but it's a matter of time to fit very well on the whole face.