Ortlieb Pannier Stabilizing Insert

"Insert for stabilizing your Back-Roller, Bike-Packer, Velo-Shopper or for bags with a similar shape. The Pannier Stabilizing Insert reinforces the base and rear wall of your pannier, ensuring that it stands firmly when parked. In addition, it cushions the lower part of the bag so that your equipment is not only packed waterproof, but also protected from shocks. The light-colored nylon fabric ensures that you can easily see the contents of the bag, which makes finding your equipment a breeze. The practical insert is compatible with all Back-Roller models, as well as products with a similar shape, such as Bike-Packer and Velo-Shopper, from model year 2024. 2023 models or older can be easily retrofitted with the Retro Fit Kit Stabilizing Insert (F3912) for the use of the Pannier Stabilizing Insert."