https://www.braasi.com/

Made in Prague. Got one when I visited a few years back. I really like the aesthetic and the webbing on the outside is super useful to pack extra stuff. Quality is also top notch, no signs of wear after quite heavy use yet.

Pinqponq is another brand of the same company: https://www.pinqponq.com/

Different company but also from Cologne, Germany: https://www.airpaq.de/ They turn old airbags into backpacks.