To be fair, other than not staying put and feeling like I have to adjust them every few minutes, they’re surprisingly comfortable, both to wear and to breathe through. Breathing resistance is not meaningfully different than with my Flo mask.
Ok, they get more uncomfortable when talking. To the point of “gah! [yanks them out]”. So, another point against. Back, I think, to the drawing board.
Vaguely pondering the idea of taking a casting of my nostrils and having something custom made that I can put replaceable filters into. I’ve got plenty of the Flo pro filters laying around I could cut up to fit, just need the framework to hold them.