Which doesn't make sense in the open air where we're breathing comfortably.

People who lived at elevations so high that other men couldn't even breathe comfortably.

She was still breathing comfortably ten minutes later when they caught up with Rudy and Richard.

And Chekov would at least be able to breathe comfortably.

I am able to breathe comfortably and to drink the local water, but that's as far as it goes.

How many pillows do you need to help you breathe comfortably?

But almost at once, Tommy felt that the air was too hot to breathe comfortably.

Wait till you can breathe comfortably and for God's sake don't say anything.

The rain was still pattering down, cooling the air enough to breathe comfortably.

People with this condition must keep their heads elevated to breathe comfortably.