Amazon.com : CamelBak Fourteener 20 100 oz Hydration Pack 。CamelBak\'s Fourteener 20 Hydration Backpack -18 L of room for hiking gear plus space for a water reservoir. -Tahoe Blue/Lime Punch colorway -Light normal use and wear maybe 10 miles on this bag. Not stinky or broken. No imperfections to note aside from some minor dirt on pack from those miles. -This does not include any water bladder but is set up for you to add your own current favorite. The pocket closest to back has a tube hole to the front and there is a tube clip on the front chest harness . Manufacturer description: “-As a backpack it features a large main compartment, dual side pockets for additional water bottles or other gear, an easy access pocket on the belt, and quick access overflow pocket on the front to stow layers. -Supporting the pack and reservoir is an internal framesheet, padded adjustable shoulder straps and a structured waist belt. Fully articulated suspension keeps your load stable and dual side compression straps hold the pack close. -Rounding out the pack\'s features is CamelBak\'s NV (Integrated Ventilation) back panel which provides multi-directional ventilation to facilitate air flow, reduce perspiration and ensure you stay dry during exertion. -Quick-access fleece-lined pocket for your sunglasses, smartphone or other valuables”