A CUSTOM FIT, FEATURE-FILLED PACK - THE OSPREY MANTA 24 BACKPACK. This hiking hydration pack comes with the features you need to make your day on the trails a delight. The Osprey Manta 24 Backpack features an integrated raincover to keep your gear safe from surprise showers, and the 2.5-liter reservior in its own hydration compartment ensures you stay hydrated during your long days on the trail. The AirSpeed backpanel is highly ventilated to keep you cool and the harness adjusts by more than four inches, meaning you can get a perfect, custom fit. FEATURESHighly ventilated, 3D-tensioned open mesh AirSpeed backpanel with adjustable harnessDedicated hydration compartment with included Osprey Hydraulics-