I had one, then switched to an Ultramasx, riding the bus for hours a day in peak covid without issues. That company went out of business as far as I can tell t

I had one, then switched to an Ultramasx, riding the bus for hours a day in peak covid without issues. That company went out of business as far as I can tell though, so it will be back to the Airpro when I run out of filters, if I can find it.