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 - Zippered inner pocket for phone, pens etc. - 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