We have had them, gone away and have them again. Once you break them in they are ok for comfort. They will outlast your other stuff by far. They do not fade at all. We have sewn on badge tabs and name plates. We still wear our badges with them. Our shirts are also the snap style.
Not sure how they don't fade, most PPE has UV issues from direct prolonged sunlight exposure, and I don't imagine nomex would be much differant if exposed to a lot of sun.
I would imagine it is hot, just like anything else. The states forestry division wears them now also. Must be worth something. :)
we use Workrite Benchmark. Its good stuff, little expensive, but will out last everything else, and looks good. A suggestion is just get teh pants and go with something like grey polo's