Yes I know the pilots and crew members all wear flight suits and flight jackets, by top part I ment maybe just getting the upper half of the flight suit, like the sentinel shirt I know no one at nasa wears one but I wanted something more light weight, for the summer I'm still getting all three which is the flight suit, flight jacket, and sentinel shirt which seems to be like the flight suit but instead of being a one piece it's a two piece, I got all the patches and everything except for the name tags or as some people call it air wings, I've contacted G&B but it's labor day so I guess they're busy I don't know. But I don't know if its just me but on the sentinel shirts it seems that the royal blue is different from the rest or maybe it's the nomex I don't know, in some lightings and photos it looks indigo while in others it's like a lighter blue or something while the jacket and flight suit is more similar to the reference photo maybe I'm just seeing things I don't know.