Green says masks will be last to go

[Obie]

"the exhale port has no filtration"

Don't try to fly on an airplane, the flight attendants will hand you a cheap paper mask and ask you to remove your mask that is improper to use for covid.
The alternative is removing you from the airplane.

Again, I want to see a cartridge that is rated to stop covid.
It doesn't exist so you respirator is useless for use over you mouth and nose.