As other Ortlieb panniers, the Ortlieb Back Roller Core is completely waterproof. Closing the pannier is simple: roll the mouth a couple of times and insert the buckles on their counterparts on the sides of the pannier. The package contains one pannier. - 2024 model - QL2.1 system: two adjustable upper hooks and one lower hook, tool-free adjustment - Max. cargo: 9 kg - Materials: PD620 and PS490 - Large, high quality 3M reflectors on both the front and back - Welded seams - IP64 protection level: dustproof, sprayproof - 5 year guarantee against manufacturing defects - Comes with adapters for different pannier tubing thicknesses - Simple hooks that attach to the rack are opened easily by pulling the handle - Easy to clean, both inside and outside - Made in Germany - PFAS-free The package contains one pannier. You can choose which side of your rear rack to use it on. The manufacturer's volume data applies when the mouth is rolled according to instructions. If you don't roll the mouth