I have a cool, but not so scientific idea. When you take a bed to space, it says you might die of oxygen loss. My suggestion is if you have some kind of Oxygen Sealer, or Oxygen Bubble Distributer, then you should be able to sleep with still a risk of oxygen loss. It would be one of those, "Do at your own risk" kind of things. It might not seem good, but: You'd sleep though a good chunk of time It would decrease the need for desh. It would be entirely the player's decision, and You wouldn't entirely die, because... You guys can also add a function to the oxygen mask so that it tells you when your oxygen is low, and you would be woken up when it is low, so that you would still have time to refill it... if you can. If you don't have the necessary materials yet, then don't sleep!