Cut the tip of a "slouch" beanie. Perfect dreadband.
updated by @michael-olson: 07/22/15 08:40:15AM
rubber bands work for me. I use the clear kind. They haven't melted, they just break. Maybe you could look into that if you must have them?
I use mine for keeping loose hairs together and fattening up the flat dreads in the back Just make sure you air dry your hair. You don't want mildew in between the rubber band.
they might not meltbut they might break? that's no better as when they break they can break leaving lil pieces still stuck in the dreads
oh nevermind he was a spammer (sorry this week haven't been replying immediately and missed the spammer my email notifier has been not working right)
had to remove his spam links from the quoted part too