Going for a big run or ride? Bring along CamelBak's superlight Octane 18X pack. Made of lightweight materials, it weighs just over a pound and still totes a full 100 ounces of liquid. Thoughtfully distributed cargo space with internal organizers for extra layers and food hold the necessities for being in the wilderness most of the day. It's also expandable to carry the perfect amount of gear depending on the length of your excursion. The Air Channel ventilated back panel keeps air moving to cool you off and the Independent Suspension harness delivers excellent support. Plus, the Octane even has waist belt pockets for easy access to important gear.