Amazon.com : CamelBak Women。CamelBak Women’s Helena 20 Hiking Hydration Pack - 85 oz Designed clean and compact without sacrificing storage, The Helena 20 walks into every adventure with 20 liters total capacity and a 2.5L Crux Reservoir for all day hydration. Room for extra layers, an organized pocket for essentials, and a load bearing waist belt for stability. Side stretch pockets stow an extra bottle for back-up hydration. Shed extra layers into a stretchy overflow compartment and pile on additional gear with external attachment points - no repacking necessary. Women\'s specific fit and partially made with post-consumer recycled materials. Breathable Air Mesh For lightweight comfort and air flow Cargo Compression Keep gear close to your body for better balance and increased stability Essentials Org Pocket Keeps your small essentials organized and secure Load Bearing Hip Belt with Cargo Transfers weight to hips and offers additional storage 1.52\" X 9.84\" X 18.5\"