For days you need a little more of everything, the H4 NDM is for you. Extra storage space for all your gear plus a whooping 2.5 liter hydration pack is ideal for the hardy adventurer. The H4 NDM is the big daddy of the USWE hydration pack range. Offering everything a hardy adventurer requires - serious storage space and a 2.5 liter/85 ounce hydration bladder - it delivers class-leading fitment with its ergonomic strap design. Allowing free and easy access to jersey or jacket back pockets, in addition to one cavernous main storeroom compartment the H4 NDM also features numerous extra pockets, ideal for tools and spares, energy bars, and phone/wallet/keys. USWEs revolutionary NDM 4-point harness design ensures that the H4 NDM hydration pack remain exactly where its intended - on your back, even over the roughest terrain. Put simply they dont bounce around, which means the days of having to wear an uncomfortable, distracting, and inefficient system are long gone. The NDM harnesses have variable Velcro straps and dual loop adjustments to allow full body movement. With the NDM 4-point harness design a truly customized fit can easily be achieved (Small to X-Large). Key features: Multiple storage options for tools and personal belongings, Replaceable hydration bladder, Easy open/close adaptor cap, silicone drink tube, 90 degree bite valve, 2.5 liter/85 ounce hydration bladder; Total Storage Capacity 9.5 liters.