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I looked on the internet for the machine to know it and the truth is that the mask must be very uncomfortable at bedtime, but everything is for health and being alive. Thank God that in medicine there is a lot of technology that saves lives and yours is one of those. Thanks for sharing the information @harlowjourney. I really liked your post.

You know, most people find it uncomfortable, but my sleep apnea was so bad that it took me very little time to get used to it, and now, I am uncomfortable without it. It probably seems surprising. Thank you for your comment.