OK you Star Wars experts out there......
Question "What does that respirator pipe into the pocket actually connect to" ?
There appears to actually be a curious story behind that.
Lucas was inspired by the look of WWII pilots, and the hose resembles an oxygen tube. Yet there's no mask on the face to attach it to.
However, the original X-Wing helmet
did have an attachment point for a hose:
Original X-wing pilot helmet prototype from Star Wars: Episode IV A New Hope
A prototype prop X-wing Fighter Pilot's helmet, the unfinished helmet of grey/brown vacu-formed plastic, with ridged top and sides and bolted-on mouthpiece section made for
Star Wars in 1976. This helmet was made by Shepperton Design Studios (set up by Andrew Ainsworth in 1974) the company responsible for the production of all the helmets and armour (with the exception of Darth Vader) used in
Star Wars, 1977.
Star Wars Costume Designer, John Mollo, asked the vendor to work on the film after discovering that the vendor had the equipment needed to make the specialised vacuform plastic. To this end, with a frenetic deadline, they worked around the clock in their design studio from March - June, 1976 whilst filming was being carried out at Pinewood Studios. At that time, the huge success of Star Wars had not been anticipated and, according to the vendor, the making of the costumes was very much a process of trial and error. The company's original receipts show that in total they made fifty-six Stormtroopers' helmets, twelve Imperial Forces' helmets, twelve Imperial Fighter Pilots' helmets and twenty X-wing Fighter Pilots' helmets. This helmet is a prototype of the X-wing Fighter Pilots' helmets seen in the sequence where the Rebel Forces prepare to fly off in their X-wing fighters to attack the Death Star. The final used version of the helmets were painted white with red and blue insignia; they also had chin straps rather than the mouthpiece section of the helmet in this lot.
http://www.sciencefictionarchives.c...rototype-from-star-wars-episode-iv-a-new-hope
But for budget and time constraints the Rebels would've been equipped similarly to TIE Pilots: