When I was a child, I loved playing with the classic Lego space models and the astronaut minifigs always were my absolute favorite. This is a helmet and an air tank to turn one of Skimbal's giant minifigs into a classic Lego astronaut.
The helmet came out a little bit too loose on my printer, so maybe you might want to scale it down by a few percent.
Helmet has to be printed with full support, I printed mine in exactly the same orientation as you put it on the figure later.
The air tank and it's holder don't need support.