With the Aquarius Pro 3.0 hydration system, you'll always have access to the liquids your body needs without getting off your bike or taking off your backpack. This food-safe, neutral tasting 3-liter hydration bladder fits in all hydration bladder compatible VAUDE backpacks. It's got a slim design for excellent weight distribution on your back. The hydration reservoir comes with a lightweight, self-sealing valve that can be opened and closed with one hand and a larger mouthpiece to quench your thirst even faster. The hydration bladder is completely reversible for easy cleaning and thorough drying; it can also be washed in the dishwasher. The Aquarius Pro 3.0 hydration system comes with a cleaning brush for the drinking tube.