Backpack or bike bag? Both! It is the ideal companion for commuters who want a secure fit of the bag on the bike during the ride, but then want to wear it on the train and bus or university as a backpack. The bag is attached to the luggage carrier via the QMR hooks (e.g. Abus 145/20, not included), which can be locked with a lock, and is converted to a backpack in no time. To do this, the two vertical zippers are opened and the entire fastening system is stowed in a compartment closed with Velcro. But the clever backpack-bike bag combination offers even more. In the large main compartment, in addition to DIN A4 documents, water bottle and snack, there is also room for a change of underwear. A separate, zippered, padded compartment holds laptops up to 15.6? A compartment extending across the entire front opens diagonally and offers a mesh organizer for cell phone, keys and wallet. On top of this compartment is an additional shallow mesh pocket for quickly stowing magazines or wet clothes. Two side compression straps, a helmet holder and the included rain cover round out the convenience features. The main material of the Cycle 28 Luminum consists of 50% recycled polyester, the contrast material even 100%. This product is climate neutral: the emissions from materials, manufacturing process, shipping were determined holistically and systematically reduced. Currently unavoidable emissions were completely offset via the independent non-profit organization ?myclimate?