Someone on Reddit did a bunch of testing on these. I love nerds
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November 18, 2025 at 4:13 PM
Someone on Reddit did a bunch of testing on these. I love nerds
The rescission does not necessarily mean the now unapproved masks are bad, but they no longer qualify as OSHA compliant for workplace use.
www.reddit.com/r/Masks4All/...
www.reddit.com/r/Masks4All/...
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May 21, 2026 at 2:26 AM
The rescission does not necessarily mean the now unapproved masks are bad, but they no longer qualify as OSHA compliant for workplace use.
www.reddit.com/r/Masks4All/...
www.reddit.com/r/Masks4All/...
Haven’t been able to afford anything from them recently but may again soon though now will definitely not be going back to @blickartmaterials.bsky.social again so long as this is their policy.
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December 12, 2025 at 3:06 PM
Haven’t been able to afford anything from them recently but may again soon though now will definitely not be going back to @blickartmaterials.bsky.social again so long as this is their policy.
[COVID zine 10/18]
Mask recommendations and where to buy them: www.reddit.com/r/Masks4All/...
DIY fit test instructions: www.youtube.com/watch?v=TRCZ...
Mask recommendations and where to buy them: www.reddit.com/r/Masks4All/...
DIY fit test instructions: www.youtube.com/watch?v=TRCZ...
![[COVID zine page 10]
[bold, handwritten] Finding a good mask:
Which respirators work for you depends on your face shape and head size. Some models have been shown to fit a wider range of faces better.
The 3M Aura is a good, widely-available respirator.[47]
[drawing of a 3M Aura. It's a tri-fold respirator mask with head straps.]
Mask recs and where to buy them: [QR code] reddit.com/r/Masks4All/wiki
Seal check: Cover the surface with your hands. Can you feel the mask going IN when you inhale and OUT when you exhale? That's good.
[Cartoon of me with my hands over my mask]
If you feel any air leaking around the edges, the mask doesn't fit properly.
To more accurately detect leaks, try a DIY fit test.[49]
[arrow pointing to a QR code] youtube.com/watch?v=TRCZ8Qnf0Z0
Basically, you use a nebulizer to fog around your mask with a saccharine or Bitrex solution. If you can taste the solution inside your mask, there's a leak!
[Cartoon of a person doing a DIY fit test. They're wearing a head-strap mask, have a garbage bag over their head, and are fogging inside the bag with a nebulizer]
[Close-up of the person sticking their tongue out, seen x-ray style inside the mask. The mask is surrounded by fog. There's a question mark by the stuck-out tongue, representing “can you taste it?”]](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:twccexjsbh6y2tyhysjrhc2v/bafkreifnxi4xvgr4apmi6q25tvmwc6obcbn7dskluswsohjwwkd3ktank4)
January 16, 2026 at 4:58 PM
[COVID zine 10/18]
Mask recommendations and where to buy them: www.reddit.com/r/Masks4All/...
DIY fit test instructions: www.youtube.com/watch?v=TRCZ...
Mask recommendations and where to buy them: www.reddit.com/r/Masks4All/...
DIY fit test instructions: www.youtube.com/watch?v=TRCZ...
Love 'em or hate 'em, there is a great new write up on the hows and whys of bi-fold respirators, the shape most people associate with KN95s by Vasilisnp2.
reddit.com/r/Masks4All/...
reddit.com/r/Masks4All/...
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March 24, 2026 at 5:10 PM
Love 'em or hate 'em, there is a great new write up on the hows and whys of bi-fold respirators, the shape most people associate with KN95s by Vasilisnp2.
reddit.com/r/Masks4All/...
reddit.com/r/Masks4All/...
If you are wearing high-quality legit respirators that fit you well, you can absolutely reuse them.
Good advice here:
www.reddit.com/r/Masks4All/...
@masknerd.bsky.social's interview with a gal from 3M, timestamped to skip right to the question of mask reuse:
youtu.be/6tk9PNOHWng&...
Good advice here:
www.reddit.com/r/Masks4All/...
@masknerd.bsky.social's interview with a gal from 3M, timestamped to skip right to the question of mask reuse:
youtu.be/6tk9PNOHWng&...
totallysonic's comment on "How many times can a mask be re-worn?"
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April 9, 2026 at 5:27 AM
If you are wearing high-quality legit respirators that fit you well, you can absolutely reuse them.
Good advice here:
www.reddit.com/r/Masks4All/...
@masknerd.bsky.social's interview with a gal from 3M, timestamped to skip right to the question of mask reuse:
youtu.be/6tk9PNOHWng&...
Good advice here:
www.reddit.com/r/Masks4All/...
@masknerd.bsky.social's interview with a gal from 3M, timestamped to skip right to the question of mask reuse:
youtu.be/6tk9PNOHWng&...
From the Masks4All community on Reddit
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January 16, 2026 at 3:25 PM
Since Covid levels are going up (in lots of places), a reminder that the fit of your mask/respirator matters.
Here are some mask fit testing instructions
www.reddit.com/r/Masks4All/...
#Covid #MaskUp #CovidIsAirborne
Here are some mask fit testing instructions
www.reddit.com/r/Masks4All/...
#Covid #MaskUp #CovidIsAirborne
July 19, 2024 at 7:45 PM
Since Covid levels are going up (in lots of places), a reminder that the fit of your mask/respirator matters.
Here are some mask fit testing instructions
www.reddit.com/r/Masks4All/...
#Covid #MaskUp #CovidIsAirborne
Here are some mask fit testing instructions
www.reddit.com/r/Masks4All/...
#Covid #MaskUp #CovidIsAirborne
every time i go to the masks4all reddit to get information about something i end up leaving having learned nothing new and with immense and pervasive guilt that i am not perfect at masking and don't wear the best masks so now i am really deep in the "i'm a very bad person" dwelling place
October 2, 2026 at 5:12 PM
every time i go to the masks4all reddit to get information about something i end up leaving having learned nothing new and with immense and pervasive guilt that i am not perfect at masking and don't wear the best masks so now i am really deep in the "i'm a very bad person" dwelling place
If you need help figuring out what mask to wear, feel free to reach out to me or check out the masks here: linktr.ee/buymasks
Additionally, the subreddit r/Masks4All is a good resource: www.reddit.com/r/Masks4All/
Additionally, the subreddit r/Masks4All is a good resource: www.reddit.com/r/Masks4All/
May 29, 2025 at 6:46 AM
If you need help figuring out what mask to wear, feel free to reach out to me or check out the masks here: linktr.ee/buymasks
Additionally, the subreddit r/Masks4All is a good resource: www.reddit.com/r/Masks4All/
Additionally, the subreddit r/Masks4All is a good resource: www.reddit.com/r/Masks4All/
From the Masks4All community on Reddit
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September 9, 2025 at 4:00 AM
I found this a while back: www.reddit.com/r/Masks4All/...
From the Masks4All community on Reddit
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April 28, 2025 at 8:52 PM
I found this a while back: www.reddit.com/r/Masks4All/...
Someone on Reddit posted a summary of the most breathable masks @masknerd has tested, based on the masknerd database.
www.reddit.com/r/Masks4All/...
They also posted a summary of the most breathable masks tested by ArmbrustUSA on their TSI testing machine.
www.reddit.com/r/Masks4All/...
www.reddit.com/r/Masks4All/...
They also posted a summary of the most breathable masks tested by ArmbrustUSA on their TSI testing machine.
www.reddit.com/r/Masks4All/...
More-breathable-than-Aura masks, part 2 (via Armbrust)
www.reddit.com
July 31, 2025 at 5:03 AM
Someone on Reddit posted a summary of the most breathable masks @masknerd has tested, based on the masknerd database.
www.reddit.com/r/Masks4All/...
They also posted a summary of the most breathable masks tested by ArmbrustUSA on their TSI testing machine.
www.reddit.com/r/Masks4All/...
www.reddit.com/r/Masks4All/...
They also posted a summary of the most breathable masks tested by ArmbrustUSA on their TSI testing machine.
www.reddit.com/r/Masks4All/...
😷 Thinking of going back to masking? In Canada there's @donatemask.bsky.social. Buy from their shop if you can, it funds the mask donations! They also have a sampler pack to let you try different ones. In the U.S. search for local mask blocs. For general mask info
r/Masks4All is a good resource.
r/Masks4All is a good resource.
I know we can't personal responsibility our way out of the US gov destroying our vital health departments. But wearing a high-quality mask (N95, KN95, etc) in public spaces is still the easiest best way you can protect yourself and community. If you quit masking, now is a good time to start again!
April 2, 2025 at 11:00 PM
😷 Thinking of going back to masking? In Canada there's @donatemask.bsky.social. Buy from their shop if you can, it funds the mask donations! They also have a sampler pack to let you try different ones. In the U.S. search for local mask blocs. For general mask info
r/Masks4All is a good resource.
r/Masks4All is a good resource.
If you're suggesting a full-face respirator over half on the basis of efficacy, buying a $30 no-name Amazon one kind of defeats the purpose. That isn't NIOSH-approved (RIP NIOSH)
www.reddit.com/r/Masks4All/...
www.reddit.com/r/Masks4All/...
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June 7, 2025 at 10:11 PM
If you're suggesting a full-face respirator over half on the basis of efficacy, buying a $30 no-name Amazon one kind of defeats the purpose. That isn't NIOSH-approved (RIP NIOSH)
www.reddit.com/r/Masks4All/...
www.reddit.com/r/Masks4All/...
Donate A Mask is run by volunteers. Our Request Program is powered by donations from people like you.
We raised over $2300 during the matching fundraising campaign. That money will go toward sending masks to people who need them.
#ThanksAMillion #Masks4All
We raised over $2300 during the matching fundraising campaign. That money will go toward sending masks to people who need them.
#ThanksAMillion #Masks4All
September 14, 2026 at 5:11 PM
Donate A Mask is run by volunteers. Our Request Program is powered by donations from people like you.
We raised over $2300 during the matching fundraising campaign. That money will go toward sending masks to people who need them.
#ThanksAMillion #Masks4All
We raised over $2300 during the matching fundraising campaign. That money will go toward sending masks to people who need them.
#ThanksAMillion #Masks4All
And for even more resources, check out r/MasksForAll: www.reddit.com/r/Masks4All/
Masks4All
www.reddit.com
October 18, 2023 at 9:25 PM
And for even more resources, check out r/MasksForAll: www.reddit.com/r/Masks4All/
A NIOSH P100 respirator filters tiny PM 0.3 particles at 99.97% or better at 85lpm of airflow (total filtration efficiency in mask will be lower due to imperfect face seal).
Use a well fitted certified respirator for welding fumes, not un-certified nostril filters.
www.reddit.com/r/Masks4All/...
Use a well fitted certified respirator for welding fumes, not un-certified nostril filters.
www.reddit.com/r/Masks4All/...
From the Masks4All community on Reddit
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April 27, 2026 at 8:48 PM
A NIOSH P100 respirator filters tiny PM 0.3 particles at 99.97% or better at 85lpm of airflow (total filtration efficiency in mask will be lower due to imperfect face seal).
Use a well fitted certified respirator for welding fumes, not un-certified nostril filters.
www.reddit.com/r/Masks4All/...
Use a well fitted certified respirator for welding fumes, not un-certified nostril filters.
www.reddit.com/r/Masks4All/...
I swiped this from the wiki for the Masks4All sub on reddit.
June 12, 2024 at 2:52 AM
I swiped this from the wiki for the Masks4All sub on reddit.
Psst… find well-priced 3M Auras at our charity store: a box of 50 3M Aura 1870+ respirators for $24.99 or a case of 440 for $99.88! 😷
At these prices, you can afford to protect yourself and your community. 💙
buymask.ca/products/3m-aura-particulate-respirator-1870-n95
#StillMasking #Masks4All
At these prices, you can afford to protect yourself and your community. 💙
buymask.ca/products/3m-aura-particulate-respirator-1870-n95
#StillMasking #Masks4All
June 25, 2026 at 11:14 PM
Psst… find well-priced 3M Auras at our charity store: a box of 50 3M Aura 1870+ respirators for $24.99 or a case of 440 for $99.88! 😷
At these prices, you can afford to protect yourself and your community. 💙
buymask.ca/products/3m-aura-particulate-respirator-1870-n95
#StillMasking #Masks4All
At these prices, you can afford to protect yourself and your community. 💙
buymask.ca/products/3m-aura-particulate-respirator-1870-n95
#StillMasking #Masks4All
4/
Or alternatively, on Reddit (with some helpful comments from other r/Masks4All Reddit users too) -
www.reddit.com/r/Masks4All/...
Or alternatively, on Reddit (with some helpful comments from other r/Masks4All Reddit users too) -
www.reddit.com/r/Masks4All/...
From the Masks4All community on Reddit: Bulk SIP Valve individual components
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March 9, 2025 at 5:57 PM
4/
Or alternatively, on Reddit (with some helpful comments from other r/Masks4All Reddit users too) -
www.reddit.com/r/Masks4All/...
Or alternatively, on Reddit (with some helpful comments from other r/Masks4All Reddit users too) -
www.reddit.com/r/Masks4All/...
R/ABraThatFits, r/ADHD, r/cfs, r/childfree (for sterilisation doctors), r/CPTSD, r/Masks4All, r/Menopause, r/Perimenopause, r/ptsd, r/ZeroCovidCommunity all have lots of good information in each of their About sections.
I'm sure there are more, too.
I'm sure there are more, too.
I don't use Reddit a lot, but I think people unfairly dismiss it when there are some very good resources on there, especially for some health conditions.
July 17, 2025 at 5:42 AM
R/ABraThatFits, r/ADHD, r/cfs, r/childfree (for sterilisation doctors), r/CPTSD, r/Masks4All, r/Menopause, r/Perimenopause, r/ptsd, r/ZeroCovidCommunity all have lots of good information in each of their About sections.
I'm sure there are more, too.
I'm sure there are more, too.