I too move around a lot at night and wear a CPAP mask and it stays on just fine. There are straps that keep it on. It takes a bit to get used to wearing it but my asthma got much better after wearing it.

There are a lot of health benefits you wouldn't think of to wearing a mask. The main one that keeps me wearing mine is heart disease. Not wearing a CPAP mask increases your risk of having a heart attack so I wear mine because my dad had a heart attack this year so I'm not taking any chances.

At the moment that is the main reason I can think of because I just woke up and am still groggy but it isn't from wearing the mask it is because my brain takes a bit to realize that yes I am awake.

Jan