What is the best iPhone armband (for running)?

I actually found a great, inexpensive one from either Target or Wal-Mart. It is made by "Sport Line" and has an adjustable velcro strap so it stays on your arm really well. It also has a small zipper pouch to hold cash or your key etc which is really handy :)

Here is an example of the one I have on Amazon (for $15.70)

http://www.amazon.com/Sportline-860-Reflective-Sports-Armband/dp/B000O3T...