Interesting 🧵 by @ghhughes.bsky.social on XTwitter, sharing his pressure drop (breathability) results for various masks/respirators:

5-tweet 🧵w/ chart + info about his setup
threadreaderapp.com/thread/20158...

#GoodMasks #Breathability #PressureDrop

Wear goodmasks if you have to be outdoors for any time and hydrate