This water resistant bag has two foldout side bags and a compartment in the middle offering huge amounts of storage. The Z Traveller 80 uses Velcro straps in its fitting system making it compatible with all types of pannier racks. Itt get damaged if the bike falls or knocks against something. The side pockets have been reinforced with EVA shells to help protect the contents even more. The outer shell also works as a rain cover making it water resistant for when you get caught in a downpour or for the morning rainy commute.