What's a good dust mask that allows good breathing and doesn't get hot?

I unload trucks and the grit and dust from the freight is ridiculous.What's a good dust mask that allows good breathing and doesn't get hot?
You really need to think about another job. I know this one pays well, but over the long term, no dust mask is going to keep out everything. And the ramifications from respiratory diseases such as Fibrosis can be extremely bad.


And this is hard to get a settlement out of workers comp for this, doctors are only going to give you a certain percentage for diminished lung capacity. It is never enough.What's a good dust mask that allows good breathing and doesn't get hot?
the brand is 3M.