Jack Wolfskin Gravex 15

"The Gravex 15 from Jack Wolfskin is a versatile and robust bike backpack that has been specially developed for demanding bike tours. Made from durable and waterproof CROSS RIP PROOF 420D recycled material, it is the ideal companion for any weather. With a volume of 15 liters, it offers enough space for all your essentials, whether you're on your daily commute to work or shopping."
"Thanks to the innovative KLICKfix-Rack fastening system, the backpack can be easily attached to and removed from the bike, while the reinforced back ensures stability. The hermetic main compartment and the roll-top design ensure that the contents stay dry even in heavy rain. A practical inner pocket allows for organized storage of smaller items, and the reflective elements increase visibility in road traffic."
"A particular highlight is the adjustable locking mechanism, which is suitable for carrier diameters from 8 to 16 mm, making the Gravex 15 particularly flexible and adaptable. With its compact dimensions of 34 x 33 x 20 cm, it is the perfect companion for anyone who values functionality and sustainability."