I purchased this for a running wallet, while out for long distances; for times when I may want, ID, credit card, cash, phone/MP3... I am very disappointed. Problems: a) there are sewn in slots that are supposed to hold ID or credit cards, but they are too small, they don't hold standard size cards, b) an iPhone and standard iPod are a very tight fit, and the headphone port is poorly placed, c) the small zipper side pockets are too small for gels and most modern car keys (a house key would fit, but not much use when you drove to your favorite trail or running area), d) seems to conduct sweat very easily to inside of pocket. This product is so bad, I am considering taking REI up on their liberal return policy for the first time.

Got this to store my phone and keys while running, I made sure that both would fit before buying.
First 2 runs were great, very comfortable no bouncing. Then third run I put my keys in the side pocket an out the bottom they came ... upon inspection there was about a millimeter of fabric past the bottom stitch not nearly enough to hold.
Took it back figuring it was a defect but the other 2 in the store have the same problem ... back to running with my phone in my hand :<

I bought this to carry BlackBerry, keys, and a few doggie bags, but it is too small. The amount it can hold could easily fit in a pocket, so why bother with a belt.