I just recently added the ventilation pants to my ensemble. I also sport their gloves.
I never thought about wearing those head things treestuff gives me too many of under it. I figured I would end up sweating more out than I can carry in water every day.
It comes stock with the Mesh screen from Treestuff.com. However I believe you can substitute the clear plastic one in if you call them for no additional charge.
Someone else may have ordered theirs that way and would be a better authority on the matter.
The mesh visor is super beefy! Two months ago using a visorless stock hardhat I took a good size branch butt to the corner of my eye while running the rope for another climber. A few days later I ordered the Protos and haven't looked back. I do look like a stormtrooper now though, which is cool.