Here is an option for making your own filter to go inside fabric face masks using HEPA fabric taken from a HEPA air filter. I cannot make any claims for the effectiveness of this filter, except that it is probably better than a fabric mask alone.
Some have wondered if HEPA air filters are made out of fiberglass. I don’t know about all brands, but before writing this, I contacted Filtrete to see what their filters were made out of. This was the response:
“Our filters are made from Polypropylene plastic fibers and strands, adhesive, paperboard, and for some filters, metal wire. There is no Fiberglass in our Filters.”
I will put some step by step photos below, but my video tutorial is much better! It will play automatically in the video player on this page. If it does not, you can see it on my YouTube channel here.
This content was originally published here.