This may have discussed here before, but I could find nothing.
I just saw this on another forum and I thought it might be a good fit here. It is a micro-cpap machine. The Airing micro-CPAP
Here is the web address: http://www.fundairing.com/#first-ever-micro-cpap
I am only sharing because it looks like it reflects the focus of lightweight backpacking. I am currently using a Transcend cpap, but I think this is worth looking into.
It looks like their crowd funding will start next month.
I have zero affiliation with this company. I am just a backpacker that uses a cpap.

