With an expansion system for additional cargo, the CamelBak Octane 8 Hydration Pack is ready for a light trail run or a few hours of mad-paced adventure racing. Stay hydrated with this packs two-liter water reservoir. The Octane 8 Hydration backpacks insulation keeps your liquid cool, and air mesh on the back panel helps airflow, so youre not stuck with a sweat-soaked shirt. Unzip the center zip expansion section and stash an extra layer and a few snacks in this lightweight backpack. Hip-belt pockets keep small trail maps accessible.