I had two sets issued to me here at Ft. Riley.
Apparently it was an error as they were supposed to be issued only to MTT guys in 1/1 ID. Only time I took 'em out of the bag is when I had to return them to CIF.
Should have tried one on. Looked cool though.
As for the nomex "flight suits." The Army put out that soldiers must increase their water intake while wearing the nomex suits. Just a guess, but with that, they probably don't breath as well as ACUs... and some of us know what a joke that is.