Had my CPAP sleep study last ight. The masks sure are different! And for the better. The one I picked out is one of the kind that go right up into my nostrils. They said I had petite nostrils!!! I didn't know there was anything petite anout me. There were a couple of those kinds. This is the one that has a chin strap with it. I very easily moved around in bed. And I slept like a baby all night long!!!!!!!! I did take an extra Klonipen and my quilt. i don't know if it was one of those or the actual CPAP that helped me sleep. So they will compile all the info, call me for my preference of Home Health agencies and then get me set up.