For hiking or trail running, the CamelBak Women's Octane 9 2L Hydration Pack is designed specifically to fit women comfortably and has plenty of storage for all the essentials. This pack features 3D vent mesh to provide multi-directional air flow and provide extra cushioning. The 2-liter reservoir keeps you hydrated throughout any adventure. It has organization pockets for small accessories, Quick Stow flasks, and any extra gear as well as attachment points for trekking poles. DESIGN Women's specific hiking hydration pack 3D vent mesh for airflow and cushioning Adjustable dual sternum straps CRUX(TM) reservoir with Quicklink(TM) system Top-pack access for easy opening Tube trap keeps drink tube secure Storage for Quick Stow flasks and small essentials Stretch overflow pocket for extra gear Trekking pole carry function Reflective design and emergency whistle for safety Additional Details Got Your Bak(TM) Lifetime Guarantee Style: 1848401000, 1848601000