Yes. I think the most common intended use of these masks are things like protecting the wearer from dust.They make masks with outflow valves, so when you breathe out it all goes out the valve rather than getting backed up by the material. It will keep you cooler.
It, also, completely defeats the stated purpose of protecting others if you happen to be contagious. The mask does nothing to contain any virus in your breath. It may provide you some protection if you are very near someone else who is contagious, assuming you are changing out the masks frequently and using proper protocols not to infect yourself by touching the mask etc.