Masking at Work

I work for a cleaning company in a small team of 3 and right at the beginning I asked my boss if it would be a problem that I always wear a mask at work.
She said, no, of course not, there is another employee who also always wears a mask. She also mentioned that it has never been a problem and that it’s my decision, I am welcome to mask.
Then my friend started working here, too, so we are two covid-cautious people, which makes it even more safer and funnier, too.
While cleaning the rooms, we can always open the windows. We work alone, so it’s a very safe work.
After three years of just homeschooling our kids, it’s a real pleasure to have such a nice work environment with friendly and understanding colleagues and earn our own money again.
M. and S. from Germany