Comparing KN95s, KF94s, and Mask Fitters

Findings

Summary of effective filtration of KN95, KF94, and FTM Mask Brace on 4 subjects
  1. Effective filtration varied by up to 30% between team members depending on who was wearing a given mask
  2. Some people can get good seal with a KF94 (but not everyone)
  3. Ear loop masks like KN95s may not be a good option
  4. Any of these masks is better than no mask. Don’t let anyone tell you that N95s/KN95s/KF94s “don’t work” or “do almost nothing” if they don’t seal well, but do consider using a mask fitter to improve your fit.

What are these masks??

KN95

KF94

FTM Mask Brace

Methods

  1. Normal breathing
  2. Deep Breathing
  3. Turning head side to side
  4. Moving head up and down
  5. Talking (reading a predetermined passage called the Rainbow Passage)
  6. Grimacing
  7. Bending Over
  8. Normal Breathing (again)

Discussion

  • Masks move around when you do
  • Ear-loop masks have bad fit
  • Face shapes aren’t the same

Masks move around when you do

Ear-loop masks have bad fit. Head straps, ear savers, and mask braces improve fit.

Face shapes aren’t the same

But wait, aren’t KF94s and KN95s required to pass certain fit requirements?

Limitations

Sample Size

Counterfeits

Well why didn’t you test x, y, z, mask/fitter/filter combination?

Conclusions

--

--

--

The latest data and information on the Essential Mask Brace and masks in general.

Love podcasts or audiobooks? Learn on the go with our new app.

Recommended from Medium

Case study : Houzcall app redesign

A Nod To Comic Sans

User Research

Weeknote: 1 to 5 July 2019

Mozilla Logo Redesign Put to the (Preference) Test

SoundCloud Concept: Finding the Right Audio

WAZE: the interchange problem — a UX case study

3 Design Hacks for Safari & Chrome

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
Fix The Mask — the technical.

Fix The Mask — the technical.

The latest data and information on the Essential Mask Brace and masks in general.

More from Medium

Are personas really useful?

DeepMotion Collaborates with Qualcomm Technologies, Inc. on Demo for Snapdragon Tech Summit 2021

“I’ve a feeling we’re not in Canva anymore.”

Deepfakes and the Spread of Misinformation