Sold as a single pannier. The Back-Roller Core is the solid base bag among the Back-Rollers and yet 100% waterproof. With its robust polyester fabric it's not only suitable for extended bike tours but also ideal for daily urban commutes. With the Back-Roller Core you're always ready to transport important items dry and securely – whether it's on your way to work shopping or other urban adventures. A reliable companion that withstands the elements and simplifies your everyday life. If the basic functions of the Back-Roller Core are ever insufficient this practical bag can be expanded with various optional accessories. The Carrying System Bike Pannier helps carry the Back-Roller Core on your back various inserts provide stability to the bag body off the bike or offer better organization inside the rear bike bag. FURTHER PRACTICAL DETAILS + High-visibility reflectors on the outside of the bag. COLOR black MATERIAL PD620 PS490 BAG TYPE single ADAPTER Quick-Lock2.1 INSTRUCTIONS Download DATASHEET Download 360° VIEW 360° View WEIGHT 820 g 28.9 oz HEIGHT 42 cm 16.5 inch UPPER WIDTH 32 cm 12.6 inch LOWER WIDTH 23 cm 9 inch DEPTH 17 cm 6.7 inch VOLUME 20 L 1220.5 cu.inch LOAD 9 kg 19.8 lbs