Side-Sleeping Backpack, Sleep Position Trainer with Self-Inflating Airbag, Controller for Snore Relief & Better Breathing, Prevent Back Sleeping Device to Improve Your Breathing

Yea I used to have times with mask coming off, or I took it off in middle of night without remembering (a lot of people do, until they get used to it). To not roll over u can try a sleep backpack like this one https://a.co/d/0670ViaN