I've written before about the indignity of hospital robes. In my experience, they are hideous, never fit right (either they are tiny or huge) and just generally add to the vulnerability you experience as a patient.
Then I discovered the three-armhole robe.
It's a really neat design (and they actually had detailed instructions as to how to put it on taped to the changing room wall). Left arm. Right arm. Then bring it around to the front and put the left arm through the third hole. Comfortable, modest and stays put without ties.
It was a truly ugly yellow-green colour, though. I guess, when it comes to hospital gowns (and many other things in life), you can't have it all.