The Gregory Women's Juno 30 H2O Hydration Pack is a hiking pack for short adventures. This pack comes equipped with a 3L 3D Hydro Reservoir, so all you have to do is fill 'er up and head out to the trails. The pack is lightweight for fast movement so you can cover all the miles you want. The VaporSpan ventilated backpanel features vented suspension, which is integrated with the ActiveFlex harness and includes moisture-wicking mesh. This means your back stays cool and comfortable, even while carrying a small load.