Learning from the limitations of other hydration systems, Osprey havecreated the Hydraulics, a reservoir which has a lightweight handle to make filling and inserting easier and welded chevron baffles that provide stability and shape, combatting back panel bulges often encountered with flexible reservoirs. The bite valve has a simple turn on/off action and a strong magnetic system which keeps the hose and bite valve in place when not in use but offers hydration you when you need it.