These Goody metal spiral pins hold like a rock, disappear into the hair and I have not noticed any hair damage if I'm careful about removing them.

For scrunchies, you really can't do better than the silk ones. The difference when using any other material is very noticeable.

Get your Vitamin D levels checked, mine were very low and just adding D has returned my hair to its youthful glory, lol. And I feel a lot better too.