Ortlieb - Back-Roller Plus 2 Bicycle Bags granite black - Strong, streamlined and unusually practical – in Massachusetts or Mongolia. The ORTLIEB Back-Roller Plus is the ideal bike bag for those who prefer the convenience of the roll closure system. The durable, waterproof, dustproof, abrasion-resistant and high quality Cordura fabric ensures optimal protection for your gear. Equipped with the sophisticated QL2.1 system with self-closing hooks, the ORTLIEB Back-Roller Plus attaches to your bike in a flash. And simply use the easily detachable shoulder strap to carry your bike bag comfortably once you’ve arrived at your destination. Anything else to consider? Well, you’ll want to select your favorite from among the range of fashionable colors.