Show HN: I bought and tested the filtration of every mask on Amazon
Project N95 is the National Critical Equipment Clearinghouse for personal protective equipment (PPE), COVID-19 diagnostic tests and critical equipment.
Edit: stupid typo on url, sorry
<a href="https:&#x2F;&#x2F;www.projectn95.org&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.projectn95.org&#x2F;</a><p>US based non profit, not tied to amazon.  I&#x27;ve bought their stuff.  They are legit.