Haha, care to do a demonstration??
it filters out almost all of the clouds..
But gets irritating after a while..
because no cloud no fun.
Hope that this filter 2nd hand vapor for the safety of others, but i think it doesn't work base on some reports I read..
Most N95 mask filtration about 0.3 micron 95% efficiency. vaping particle 0.18~0.27 microns (iflscience).
But i think there's more to it than just the particle size. need more research.