- Face-mask guidance has evolved a few times
since the initial outbreak of the coronavirus,
but now in 2022,
with the highly contagious omicron variant spreading,
the N95 respirator is the mask you should be wearing
to best protect yourself and others from infection.
So here's what you need to know.
What's the best fit for an N95 mask?
When worn properly, N95s can filter out
at least 95% of particles in the air,
including the virus that causes COVID-19.
So for a proper fit, the straps should feel tight
but comfortable around the ears.
The mask should totally cover the nose, mouth, and chin,
and the flexible nose clamp
should be pressed for a tight seal.
How many times can I reuse a mask?
This depends on how you use the mask.
If you're only going grocery shopping for about 45 minutes,
that mask can be reused for two to three similar wears,
but if you're wearing the mask for an extended amount of time,
let's say for a full day at the office,
that mask has likely run its course
and it's time for a new one.
When is it time to throw a mask away?
The best way to know when a mask needs to be replaced
is its fit and appearance.
If the mask no longer feels snug on your ears or face,
it no longer provides protection.
Also, look out any cuts or tears
or if the mask has been soiled from daily wear.
These are all indications that you should dispose of that mask.
What about KN95 masks?
The KN95 masks are supposed to offer similar protection
to N95s,
but these Chinese-made masks have not been approved
by the National Institute for Occupational Safety
and Health, also known as NIOSH.
You can tell by looking at the logo.
About 60% of KN95s examined by NIOSH
did not fit the N95 standard,
but these masks are still a step up from cloth face coverings
or no mask at all.
What about N95s with the valve or vent?
Some masks will be marked as N95
but also have a valve or vent sewn in.
These exhalation vents designed for hot and dusty construction
work unfortunately allow the person wearing the mask
to disperse respiratory droplets to others,
causing possible infection.
Because of this, these masks are not recommended by the CDC.