The versatile, removable outer bag transports important items from tools to first aid kits. It has a roll closure and can be quickly and easily attached to the pannier thanks to the clamping mechanism. This practical companion can even be worn directly on the belt. The 2.1L version with reflector is suitable for ORTLIEB touring bags (except Back-Roller City, Sport-Roller City and Gravel-Pack), the 4.1L version fits all larger backpacks.