Those built in valves are _really_easy to block.
Rule 303 said:
Those built in valves are _really_easy to block.
I have always had problems with filter masks.
My lungs may not be good enough.
Rule 303 said:
Those built in valves are _really_easy to block.
That’s what I use. Fire brigade issue masks with the valve blocked from the inside.
Divine Angel said:
yeah, cos that’d work!
Divine Angel said:
Stoned lady should be wearing these.
roughbarked said:
Rule 303 said:
Those built in valves are _really_easy to block.
I have always had problems with filter masks.
My lungs may not be good enough.
The ones that are properly rated (they will have N90, N95, or N99, or P1, P2, P3 on them) are tested for air flow resistance as part of the certification process. If that doesn’t work for you, there’s canister masks with large filters, or even positive-pressure air supplied masks. Should all be fairly easy to get your paws on.
Rule 303 said:
roughbarked said:
Rule 303 said:
Those built in valves are _really_easy to block.
I have always had problems with filter masks.
My lungs may not be good enough.
The ones that are properly rated (they will have N90, N95, or N99, or P1, P2, P3 on them) are tested for air flow resistance as part of the certification process. If that doesn’t work for you, there’s canister masks with large filters, or even positive-pressure air supplied masks. Should all be fairly easy to get your paws on.
Be not afraid..
Yea, though I walk through the valley of the shadow of death, I will fear no evil:
Any mask with significant back-pressure – directs all the airflow around the edges – which wouldn’t stop spit.
That “surgical mask” is hopeless. The only good point is that it directs sneezes sideways instead of vertically.
https://www.abc.net.au/news/2020-09-10/covid-face-masks-fashion-history-protect-from-sun-dust-disease/12644446
