Over 35 years ago two young designers at Wilkhahn recognized that sitting still cannot be healthy. Both of them wanted to give adults their natural mobility back. Following intensive studies, they developed the FS-Line, a chair that revolutionized the office furniture industry. Since then, we have produced 40 variations of this chair. Millions of these have been sold worldwide; they have been inundated with awards and have often been imitated - but not very successfully. The principle is quite simple: the highly flexible seat shell adjusts automatically to any change in posture. The technical term for this is: "automatic synchro-adjustment". We call it "Sitting without a driving licence."