About

My name is Philip Neustrom and I love mask fit testing!

In the summer of 2021 I made a YouTube video and some Twitter threads about how to do an improvised home mask fit test. At the time I really didn't know what I was doing but I knew the home testing method I was using was really useful to me and I urgently wanted other people to know about it.

Since then, thousands of people have performed home mask fit tests and I've learned a whole, whole lot more about fit testing!

Every time I hear about someone doing a home mask fit test I see the same thing: people are often shocked that masks they thought fit them well sometimes don't, and they learn how to improve their mask fit.

With this fit test store, my goal is to bring affordable, all-in-one home fit testing to as many people as possible. 

Why should you do a fit test?  I explain using an analogy in this twitter thread.

If you're already wearing an N95/KN95/KF94-type mask, doing a fit test is a great way to reduce your risk further.

You can contact us using the contact form on this site or via email at to: [email protected].