Osprey hydraulics hose magnet kitospreys hydraulics hose magnet kit gives you the option to secure non magnetised hydration systems to the sternum strap on your pack you can also improve the efficiency of your hydration delivery by upgrading to a combination magnetic sternum bite valve and strap featuressecures non magnetised hydration systems to the sternum strap on your packbuy osprey accessories from chain reaction cycles the worlds largest online bike store