I can take mine off when I am alone in my office, so probably two hours in the afternoon following lunch.
You’re right, I don’t get an N95, just a surgical-style mask. But I’ve never heard anyone complain about a particular type of mask, the complaints are just “I can’t wear a mask”.*
* If one’s job entails a significant amount of physical exertion, I can understand and be empathetic that mask wearing could be impeding. But again, these aren’t the complaints I have heard, it’s more general bitching about mask use in general public interactions.