Endless structural details. Create a whole new look with the Karl grey-blue men's model. The dynamic design of this lace-up shoe features iconic details, like a denim-look heel clip and a streamlined leather pattern in shades of grey. The upper, a mix of leather and mesh, has a fresh look about it and is suitable for every situation in your daily life. The Karl grey-blue is dedicated to kybun founder Karl Müller III and a fitting tribute to his life's work.