The Diagon swivel chair stands out through its aluminium backrest support. While it appears to be a decorative design feature, the support also has an ergonomic function. It is based on the idea of developing a comfortable backrest by mounting it on two rubber cushions to create a movable lumbar area. The high comfort of this swivel chair is especially evident in the dynamic sitting position. The flexibly mounted backrest maximises the opening angle between seat and backrest when leaning back, thereby ensuring a pleasant motion experience. The backrest nevertheless features a slim design.