For serious touring or commuting with a healthy load, the Agu Qyoto 850 KF Rear Pannier clamps easily onto your rear rack, has an amazing 25.5 liters capacity, is fully weatherproof whether it's snow, sleet, or driving rain, and has a detachable shoulder strap so you can just clip it off your bike and use it as a regular messenger style bag.
Large pannier features a durable construction for worry free carrying
Weather proof pannier includes pullover snow cover for the foulest weather situations
Zippered inside pocket allows you to organize and protect phone, media, wallet, keys, etc
KlickFix Mounting system allows you to snap on/off your pannier for convenient use