May I suggest that the hose to the chest box may actually be some sort of beaded string - like alternating large and small plastic rings on a cord. It does not appear to spiral like many corrugated hoses. I've never seen hose quite like that.
Nice work.
If this is true, and I have no reason to believe it is not, then I think we need to question what color the items actually are. Because to me, the belt looked gray based on tones and probably psychological since the old pilot costume belt and straps were gray.. So if the belt is green, are the leg straps, cuffs, flare holder also green? Or are they a mix of several colors? Just something to think about.
What about the helmet? Any guesses on the helmet?
Hmm.. How about using a ribbed black hose and two sizes of grey O-rings in the grooves? ... Would that work?
Or maybe there are both grey and black O-rings.
I think I found the correct hose:http://hoseworld.com/acatalog/automotive_and_marine_hose.html
Scroll down and open the PDF datasheet