The air supply has long been a problem for me too, but I'm becoming more forgiving. The forcefield isn't exactly skintight; there are a few centimeters of space in between. And the belts do have largish "fanny packs" on the rear. Some kind of very compact air tanks and CO2 scrubbers could be in there. I can't buy the force-field belts for long-term use, but for maybe an hour or so in vacuum, or for filtering toxins out of an atmosphere, I can buy them.