No more bulky backs. This 25L pack combines the superior VPD back protector with a hydration pack & extra compartments for tubes energy bars rain jacket wallet & keys. The packs come in two different sizes depending on how much you need to carry & they are equipped with smart pockets to get everything at the right place. Water tube gare with neoprene lips Padded mobile & key zipped pocket Ergonomic shouler strap Heat molded back to optimise moisture transportation