The Dr in pic was wearing a Respirator, they are designed to protect your lungs. They have to be conformed to your nose to be efficient. Then there are dust masks pic 1 that look similar and may or may not have the metal pc to bend but they may specifically say "Not intended to protect your lungs". So look the package over to suite your needs.
No matter what you wear you should try to seal it to your face as much as possible.
So for those may sayers, I was a Construction Superintendent for many years and I was responsible for the safety of my employees. We had different types of "RESPIRATORS" that we used all depending on what we were trying to avoid getting into our lungs.
The N95 pic 2 we used for drywall and other contaminates in the air. We would use the ones with replaceable filters pic 3 for things like contact cement.
They all have to be worn properly as I mentioned. Whatever you wear make sure it conforms as tightly to your face as possible so the air you inhale is filtered.



