I wore duck bull masks the whole time, by halyard, it's what hospitals use. So comfortable, I can wear them all day pretty easily, I don't like force on my ears so having the elastic around my head is like it's not even there.

And very easy to breathe in, very little static pressure difference

Same for long flights, not bad at all

I've been thinking about trying to get a valve on it. I haven't done valve masks because I think it's more polite to help filter myself, but now that most people aren't wearing a mask (on the plane, etc, not in a hospital I mean), it'd be nice to have a valve so it's not so humid

I also had to buy the duck bills in bulk from a medically supplier and it's annoying to have to get another huge pack