DURABLE: The NOBO Hydration Pack is built to be rugged and resilient in order to withstand any adventure: water resistant nylon exterior, YKK metal zippers, water resistant nylon interior, steel frame suspension system, and flexible bladder made from recycled materials. ADJUSTABLE: Designed with four adjustable straps so that you can get the perfect fit: chest adjusting strap, load adjusting strap, shoulder adjusting strap, and belt adjusting strap. HYDRATION: Built with hydration front and center so that you can take it anywhere from a quick run to an all-day hiking adventure with a three-liter easy fill bladder, easy flow technology and simple cleaning of bladder and bladder tip valve. FUNCTIONAL STORAGE: Functional storage provides convenient access: full zip front loading, three exterior zipper pockets, and five interior storage compartments.