Nona Dome 4.0 is a half dome shaped tent 4 metres in diameter, 2.1 metres in height and with a weight of less than ​8 kg. Its name refers to a nonagon – a nine-sided, particularly stable polygon. Various ventilation options including three openings at the top and three at the bottom, allow the creation of a natural airflow inside the tent. The six side doors with mesh windows can be fully opened to form a sun shelter. In addition, another Nona Dome or tarp can be connected to each door.