Quote Originally Posted by sjane View Post
I use Goody StayPut Elastics. My hair's fine and super straight, and these stay in really well.
I second these. There was a 2-pack of them in the rider packets for the Arizona Bike MS a couple years ago. I loved them because my hair is very fine and slippery and would always end up a mess during exercise. Those things would just stay put without me having to keep cinching up my ponytail.

I don't use them anymore, only because I hacked off about 10 inches of my hair for donation this past spring and have been keeping it trimmed to above-chin-length since then.