Back to the C-17 question, why
wouldn't aircrew want to wear flight suits, as its operational and combat flying and landing near the front line. Were the Lyneham WIng, and Brize squadrons all wearing no.2 during operations from Corporate to Granby and Deny Flight to Enduring Freedom and Iraqi Freedom?
I'm guessing that the then Lyneham lot wore flight helmets for the likes of delivering aid to Sarajevo etc etc like our American cousins did. If you look at Tim Laming's publication on the Bosnia Air War, a good photobook (done with help from an ex gf's brother whose a professional photographer) , there's a nice photo of a Ramstein Fat Albert pilot with CS vest, nice little automatic and HGU-55P. The same b/w photo was used in the USAF Yearbook 1993 published by the RAFBF.
Unless one is 007 and arrive in a penguin suit into a firefight
In a Hollywood type National Lampoons or Hotshots production one could imagine a crew of Air Seeker / Rivet Joint, decked out in penguin suits and a red rose in the lapel
Cheers