Review (2/5): Nope.
I wouldn't list this as "stay on". I don't think this works as stated. To make it stay on I either have to tie it tightly, which cases discomfort and a slight headache when trying to sleep on it, or I have to wear a bonnet with it. So with a bonnet, ok. It helps my hair not move around inside the bonnet, but without it- forget it. Great idea, but misfire.