>>9653059Yep, these are needed to trap the particles that the viruses are on. You don't need the big cartridges unless you don't have anything else to mount the pre-filters on. Don't forget the plastic retainer.
I'm not using one of those vapour cartridges since those are expensive and I only have one pair.
Without them, I can sniff all the braps I want without catching Corona-chan.
