The concept of separating and reassembling a unitary seat shell makes the armrests key connecting points between the seat and backframe. The well-balanced shell shape is interrupted to create a visually light appeal, but the contours are still recognizable. So models with different back heights can be created. With permanently elastic attachments and the upholstered, wave-sprung seat and backframe, the innovative swivel frame with Y-shaped bearer and rear leaf-sprung support ensure three-dimensional sprung seating comfort – without any mechanics involved.