How to have some 'move" in the hair without damaging them

Hi Girls! 

These last times, we talk a lot about sock bun (or chignon bun) ant it's true, it's a really pretty bun. But, it's so heavy for me, I can wear it for only 2 hours, no more. Or I get a headache! So I wear it only during the night, while I'm sleeping. I just put a little bit of water on it (if they're to wet, it doesn't work) and I make the bun as usual.

The result is always different, sometimes I have some pretty curls, sometimes, it's just the ends who curls and today for exemple, I have a kind of "move" (do you say that?) in the hair and it's lovely. 

Tadaaaam:

I have more volume and I love it! 

I would love to make a tutorial but it already exists plenty of it so here is a video from Loepsie, you just need a socks and a band :-)