The Back-Roller Core is the solid basic bag among the Back-Rollers and yet 100% waterproof. With its robust polyester fabric, it is not only suitable for extended bike tours, but also ideal for everyday journeys in the city. With the Back-Roller Core, you are always ready to transport important items safely and dryly - whether you are travelling to work, shopping or other urban adventures. A reliable companion that withstands the elements and makes your everyday life easier. If the basic functions of the Back-Roller Core are no longer sufficient, the practical bag can be extended with various optional accessories. The Carrying System Bike Pannier helps you to carry the Back-Roller Core on your back, various inserts serve to stabilise the bag body off the bike or keep the inside of the rear pannier tidy. TECHNICAL DATA: Colour: aluminium grey Bag type: Single bag Height: 42 cm Bottom width: 23 cm Volume: 20 litres Features: ip64, ql21 Material: PD620, PS490 Mounting system: Quick-Lock 2.1 Weight: 820 g Top width: 32 cm Depth: 17 cm Payload: 9 kg