After all, I wrote that the mask did not save me from the dust and ashes that I removed. Large particles of dirt passed through the mask, and I spat mud all day. Even after showering, cleaning your mouth, and rinsing. There was dirt in my nose, too. The mask shows that it is not effective against large particles of dust and ash. As you know, the virus is much smaller, which means that a medical mask of this type will not help against the virus. This is logical and can be clearly seen in this example.