I couldn't really figure it out.
I didn't spend long enough with this product to figure it out.  I know other reviewers said that it definitely takes some persistence, but I didn't really put much time in and gave up pretty easily.  My hair kept slipping out as I was rolling it, and by the time I got it all rolled back up it didn't seem like it could close very well.  I have very long hair though, at least halfway down my back.  I probably won't spend any more time trying it though, because I've decided to chop it all off into a pixie cut.
Rating: 3 stars