I guess I am one of the few people with apena that just couldn;tget used to the machine when I did my study I had no problem wearing the mask but once I got my own machine I could never get used to it I tried every mask on the market including the little pillows that set just in front of the nose. I lost many nights of sleep trying to get used to the machine after about 6 months I finally just gave up however I do use my oxygen when I sleep so that does help some Good luck I hope it works for you