Backpack or bike bag? It’s both! It’s the ideal companion for bike commuters who want a secure bag attachment during the ride, but also want to carry the bag as a backpack on the train, bus or on campus. The bag attaches to your gear rack with QMR hooks (e.g. Abus 145/20, not included) that can be locked and can be converted to a backpack in a breeze. Just open the two vertical zips and the entire system can be stowed away in a compartment with Velcro closure. But this smart backpack-bike bag combination offers even more. It has a large main compartment that can hold DIN A4 documents, a water bottle, snacks and a change of clothes. A separate padded compartment with zip closure accommodates laptops up to 15.6″. A compartment extending across the entire front opens diagonally and provides a mesh organizer for your phone, keys and wallet. This compartment also has a flat mesh pocket for fast storage of a magazine or wet clothes. Two side compression straps, a helmet holder and the included rain cover round out its comfortable features. The primary material of the Cycle 28 Luminum consists of 50% recycled polyester, the contrast material is 100% recycled. This product is climate neutral – we’ve analyzed and systematically reduced all emissions arising from materials, manufacturing, and shipping. Emissions that are currently unavoidable were fully offset by the independent non-profit myclimate organization.