Ortlieb panniers set the standard by which all others are judged. They're waterproof and durable, with a reliable attachment system. Their roll-top closure is quick and easy to use. We've been using them for years for both city and touring use, and they've never let us down.
Each bag has a capacity of 12.5L. These are perfect either for a front pannier rack (like the Tubus Duo), or as small rear panniers.
These bags are made from the premium Cordura fabric, which is lighter than standard pannier fabric. Price is per pair.