Built for trail running and fast-paced hiking, the Women's Octane 9 is designed specifically for women. The best-in-class Crux reservoir holds 2 liters of water, but if you need to carry more, stash a Quick Stow flask in one of the specifically sized harness pockets. Designed just for women, the harness allows your gear placement to be customized with the use of upper and lower pockets so you can carry your water and fuel where it's most comfortable. The stretch overflow on the back is perfect for a rain shell or extra layers while attachment points allow you to secure trekking poles, or additional gear. For trail runs, hiking, or run commuting to the office, the Octane 9 has you covered.