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Naomi Wu 机械妖姬 on Twitter
Naomi Wu 机械妖姬 on Twitter
I've been trying to explain this for two years now. N95s were designed primarily for male caucasian faces. KN95 and KF94 standards came about not because we wanted a knockoff mask standard, but because Asian faces could not pass fit tests with N95 masks.
#masks#Discussion#fit test#Useful#resources
·twitter.com·
Naomi Wu 机械妖姬 on Twitter
Fit Test the Planet on Twitter
Fit Test the Planet on Twitter

Thread Unpacking the multiple layers of wrong assumptions: Layer 1: An implicit misunderstanding of how electret filters work - thinking that they’re like sieves rather than the overlapped sticky spiderwebs that they actually are.

#masks#Discussion#fit test
·twitter.com·
Fit Test the Planet on Twitter
Jeff Gilchrist on Twitter
Jeff Gilchrist on Twitter

Fit Testing to ensure a good seal on your mask [Part 1]

This thread explains what mask fit testing is (qualitative and quantitative), why it is important, and my testing experience with some real-world results of various types of masks including NIOSH N95 and ear loop. 🧵1/

#masks#Discussion#fit test
·twitter.com·
Jeff Gilchrist on Twitter