InCharge Black Office with no ring barThe elegant InCharge Black Office chair was designed Nanna Ditzel in 1993. It is created in a functional and timeless design for today's and future workplaces. The model is similar to InCharge Office with the exception that the frame is black. The philosophy behind Ditzel's design is built on human anatomy and a principle of being active and strengthening the body through a natural balance even when you sit down. The chair itself does not take much