This lightweight, versatile nylon bag is specifically designed for ORTLIEB bicycle bags produced between 1996 and 2007, including the Back-Roller, Front-Roller, Bike-Packer, and Sport-Packer models. Simply slide the two plastic tabs between the back wall and reinforcement plate of your bag to easily store and access small items like pocket knives, tools, flashlights, papers, and pens. Additionally, the In-Put bag doubles as a practical toiletry bag or chest pouch, with its drawstring and zippered compartment. Please note that the City line and all ORTLIEB bags produced after 2007 already come with a standard inner bag, and the In-Put bag is not waterproof.