The adaptable and detachable exterior pouch provides room for essential items such as tools and a first-aid kit. It comes equipped with a roll-top closure and can be effortlessly and swiftly attached to the pannier using a convenient hook-on system. Alternatively, you can wear this compact bag on your belt. The size S variant, complete with a reflector, is compatible with all ORTLIEB bike panniers (excluding Back-Roller City, Gravel-Pack, Downtown Two, Velo-Shopper, and Office-Bag), while the size L version is designed for larger backpacks.