The Z Traveller 60 Rack Bag boasts a large, expandable volume thanks to its pannier-like opening. It also has a smartphone pocket and side pocket. The Z Traveller 60 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 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.