CamelBak: Hydration, fuel, and flexibility for multi-terrain endeavors. The Octane™ 25 maxes out accessible storage and hydration with a 2-liter Crux™ reservoir with Quicklink™. Highly organized compartments for snacks, gear, and more - including a secure spot for trekking poles. Designed with a dual adjustable sternum strap for stability, plus strategic 3D mesh venting and a breathable hip belt for a customized fit and optimal air flow while you move. Quick Stow™ compatible.FEATURES3D Vent Mesh: For lightweight comfort and air flowDual Adjustable Sternum Straps: Offers a range of adjustments for a custom fit and increased stabilityFuel and Gear Storage: Multiple stow options, easily accessibleEssentials Org Pockets: Keeps your small essentials organized and secureStretch Overflow Pocket: Quickly stash or shed an extra layerSecure Phone Pocket: Keep essentials safe and easy to accessVentilated Hip Belt with Cargo: Transfers weight to hips and offers additional storageTrekking Pole Attachment: Easily attach and remove poles when neededQuick Stow™ compatible: Carry soft flask, extra hydrationTube Trap Management: Keeps your tube secure and accessible when you need itIntegrated Rain Cover: High visibility cover shields your gear from the elementsReflectivity: For low light safety SPECIFICATIONSCOLLECTION: HIKEACTIVITY: PACKSUSER: UnisexHYDRATION CAPACITY: 70 ozHYDRATION TYPE: Crux 70 oz Reservoir, StandardBPA/BPS/BPF FREE: YesQUICK LINK DISCONNECT: YesGEAR CAPACITY: 22L/1340 cu inPACK WEIGHT: 610g/1lb 6ozDIMENSIONS: 43 x 25 x 28 cmFITS TORSO: 43-53 cm/17-21 inBACK PANEL: N/ANUMBER OF EXTERIOR POCKETS: 13