I adore these scrunchies from the Goody Company. The black goes with every thing in your wardrobe. You can buy them at the dollar store too.

Goodie Scrunchies are the only ones I use. They stay in place even when I'm working out.

I love to use scrunchies when I work out. My long hair doesn't get tangled in this scrunchie and give me a headache from the pressure of a too tight material. I keep these handy because they work perfectly.