When used for extended touring the Ortlieb Back Roller Plus shows what it is made for. The tough rear pannier made of tear-resistant Cordura fabric is waterproof thanks to its handy roll closure. With its QL2.1 snap-on fixing it is quickly mounted and taken off the bike rack. And once you arrive at your destination, you can carry the Back-Roller Plus just like a shoulder bag thanks to the included strap. Sold in pairs.