The Camelbak Octane Hydration Pack comes made with 3D vent mesh for lightweight comfort and air flow, along with dual adjustable sternum straps which offer a range of adjustments for a custom fit and increased stability. Essentials pockets keep your small essentials organized and secure. Other features include a stretch overflow pocket and a secure phone pocket. Also coming with a trekking pole attachment. Quick Stow compatible - carry soft flask, extra hydration. Reflectivity for early morning or nighttime runs. Ventilated hip belt with cargo - transfers weight to hips and offers additional storage. Integrated rain cover - high visibility cover shields your gear from the elements. Capacity: 2L Colour: Black Material: 100% Polyester Code: 1140001000