If you want a bag for the top of your rack, reach for the Ortlieb Trunk Bag. The Trunk Bag has the volume of a small pannier, with aggressive features and the typical Ortlieb high-quality engineering. Great as a commuter bag, the Trunk Bag can easily be used for your lunch and a nice wind shell, with room to spare. The Trunk Bag is completely waterproof and utilizes a TIZIP main zipper for the resilient caliber and ultimate weather protection.
The innovative Ortlieb rack adapter mounting system also comes in handy for adding a trunk bag to your touring pannier set. The rack adapter has lower rails that attach to your current rack which allow you to mount your panniers lower while attaching the Trunk Bag by clicking it securely to the top.
The Trunk-Bag is available with the Ortlieb adapter system for Rack-Lock which fits almost any rack with width from 60-160mm.