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. It's made with a highly resistant fabric so it won't scuff easily and won't 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. Key Features: Material: Polyester 840D,Weight: 710g,Capacity: 20L,Mounting: Universal Using Velcro,Size: 320 x 180 x 220mm.