Hi Ada,

It is called a FlexiFit HC 407 nasal mask.
It is now very comfortable and lighweight although initially it felt like I had a brick on my face and that I was choking.
The machine is whisper quiet, in fact you'd be hard pressed hearing the motor at all, it certainly doesn't keep anyone awake.
I must admit the discomfort is well worth it to have a sleep (what little sleep there is) that is not interrupted by seizures caused by oxygen sats of 50-70%.
Bye for now and take care
Tayla