For decades, Christoph Hack has been dealing with very different kinds of leather in Cologne, collecting a wealth of experience that all goes into the design of his garments. For example, Hack only works with untreated leather, on which a considerable patina forms over time. The resulting changes in colour and surface are expressly desired because they allow the leather garment to age with honour. The jackets are partially assembled at the Hack headquarters in Cologne and partly in a Polish partner company.