Avein has air cushions that match the contours of the human body, arranged on the top and bottom of the backrest and the front and rear of the seat. Each set of cushions is linked together. Air flows between the coupled air cushions in response to user posture changes in order to optimize the distribution of body pressure. Furthermore, valves have been installed to control the speed of airflow between the cushions. Air cushions are mounted on the beautiful, generous aluminum shell which is part of the reclining mechanism.