CamelBak's streamlined HydroBak carries 50 ounces of fluid—the equivalent of two large water bottles. The over-the-shoulder hose provides easy access to liquid refreshment and the breathable mesh harness keeps you feeling great. The HydroBak is compact and has a low profile, keeping it stable and out of the way. Plus, it has an external zip pocket for keys and other essentials.
For fast getaways and easy refills, this pack sports CamelBak's External Fill feature. It's a wide, screw-on top that lets you fill the bladder without having to remove it from the pack.