Ortlieb Back Roller Core Rear Pannier – 20L Each Black. The Ortlieb Back-Roller Core is the solid base bag among the Back-Rollers and yet 100% waterproof. With its robust polyester fabric its not only suitable for extended bike tours but also ideal for daily urban commutes. With the Back-Roller Core youre always ready to transport important items dry and securely whether its 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.

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