Thingiverse
Comfortable Covid Mask
por dreggory
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I used the blender add-on called facebuilder, to fit my face custom. However, you can easily customize it to your face, by putting it in hot water and shaping it to fit. Also, as of 7/22/2020 I added some files and instructions for scaling the print to your face. I designed it to use thin elastic for the straps, because that's what I had access to, but use whatever works. Elastic shoe laces work very well for straps.
I recommend printing it with 100 - 150 micron layer height, to try and create a better seal. you could also use food safe epoxy to seal holes in a lower quality print.
Some people are concerned that because the virus is so much smaller that 0.3 um that they think it's like, "trying to stop grains of sand with a chain link fence" but the physics of filtration is not that simple.
Here's a good paper on what size particles have the greatest penetrating ability for HEPA filters:
https://www.osti.gov/servlets/purl/6241348
Notice that bigger, and even the smaller
I recommend printing it with 100 - 150 micron layer height, to try and create a better seal. you could also use food safe epoxy to seal holes in a lower quality print.
Some people are concerned that because the virus is so much smaller that 0.3 um that they think it's like, "trying to stop grains of sand with a chain link fence" but the physics of filtration is not that simple.
Here's a good paper on what size particles have the greatest penetrating ability for HEPA filters:
https://www.osti.gov/servlets/purl/6241348
Notice that bigger, and even the smaller
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