I don't use a mask with my concentrator. I use the tube that has just two little things that go up into your nose and the tube goes behind your ears. I don't seem to have a problem using that. I feel the mask would be a problem for me also. The only problem I seem to have is the tubing. I sleep on my side and it leaves a mark across my face where the tubing crosses my face. It goes away after I am up a couple of hours but, I am going to fix that. I got me some very soft wrapping foam and I am going to wrap it around that tubing and see if perhaps that might stop it from leaving marks on my face. I will let you know if it works. Not a pretty sight to wake up with deep lines across your face. Heck I got enough wrinkles without deep lines caused by tubing. lolololol

My Wife recommends A Full Face Mask with a chin strap She could not use the one with the nose piece either.

I had to have the machine fixed to come on at the setting it was to run, I could not handle the ramp up setting for the same reason, when getting short of breath is an issue anything that reduces airflow can cause problems. I now use a face mask instead of one that just covers my nose, you need to try different styles and find one that works best.

l am bordER line aprea,so l just use oxygen at night

Lol I got no sleep whatsoever using the cpac machine it was far too noisy I ended up with narcilepsy too even fell asleep at the supermarket checkout with an almighty crash smh I have adaptions to keep me sat up use machine before bed and when I get up to keep my oxygen levels up but tbh had more problems with the cpac than without x