Volume expansion by zipper from 5 to 8 litersFor the mounting of the PRO tank bag you need the bike specific PRO tank ringMagnetic guide aid in the PRO tank ring for easy attachmentPre-assembled top ring guide rail for ergonomic adjustment of the tank bagTop and bottom of the tank bag made of laminated and dimensionally stable EVA materialMade from durable, highly UV-resistant 1680D ballistic nylon with water resistant interior coatingMOLLE attachment made of stable hypalon material on the top for smartphone and tablet holdersReflective details for better visibilityMesh compartments in the interiorWeather protection with the supplied rain coverRobust carrying handleCable feed-through on the front and rearCan be used with a cable lock or anti-theft protectionIncludes tank ring, top ring, rain covver, mounting instructions, and mounting materialTotal approximate weight 2.1 lb (1 kg)Two outer pocketsThe matching PRO tank ring is required for mounting on the tank.Tank bags from the PRO series cannot be combined with EVO tank rings.Material Composition1680D Ballistic Nylon