Light weight and doesn't bounce around
With a 70 oz fluid capacity this is my hydration pack of choice for runs up to four hours long. It has one compartment on the back of the pack near the fill hole. It's great for carrying a cell phone, car keys and your wallet. There are two small zippered side pockets that can hold gels, bars , TP and other small items but overall there's not a lot of storage. I use the Octane mainly as a hydration pack and carry my food items in the pockets of my Race Ready shorts. This pack is good for long races because it is light, fits snug to the body and doesn't bounce around.