Oxygen Bed

Oxygen Bed
Usually My sleeping hours are slightly over than 5 hours. But I was unable to get enough air, my sleeping hours tend to get longer. On the contrary if I can get enough fresh air, my sleeping hours are getting shorter than 5 hours.
So if I can get enough oxygen constantly while I am sleeping, my sleeping hours will be much shorter like 3 hours.
20 years ago in some department store, Ginza, Tokyo I tried oxygen bar for 5 minutes. When I talked about it, my coworker taught me there's a machine that provides oxygen concentratedly for two hours after the game of some sports. In the near future people start entering the capsule that provides oxygen while we are sleeping, then our standard sleeping hours willl be 3 hours.
We live such a very busy society.