Thank you for comments and help. I've turned off the "auto on/off" feature and have come to the conclusion the Ultra Mirage is not the FF for me. Am returning to the journey of researching and determining just which FF might work better - the proverbial quest for the needle in the haystack.I'm struggling with constant leaks on my Ultra Mirage FF and the last few nights have awakened 4-6 times because my machine has shut off. I don't know if this is result of leaks or if I'm having apnea episodes (I don't have a data capable machine). I've only had the mask a couple of weeks and have tried the Macks silicone but the mask still leaks when my face relaxes. The prospect of this being the result of apnea episodes really concerns me...is it possible for an event to turn my machine off? (I've only been on CPAP for a little over 2 months and still have much to learn). Thanks for your help
Again my thanks.