I was diagnosed with "severe" sleep apnea and have a N30 CPAP mask. It is quite comfortable when I go to sleep, but I must "fight" with it overnight. I was a left sided sleeper until I had to have a pace maker installed and now it is uncomfortable to sleep that way. However, regardless of how I start my sleep, I end up on my side and 8 out of 10 nights, the machine says mask wasn't sealed. I have shoulder length hair, so I tried adjusting my hair so the head piece would fit better but to no avail. We tried a new over the nose mask but that was way too claustaphobic for me and went back to the N30 and continue to have the same issues. Any advice would be greatly appreciated, as I really like the N30 mask. Thanks so much