The Na’vi prefer to sleep in large groups for physical closeness and comfort. This arrangement also acts as an effective early warning system in the event of danger. Clans who dwell in Hometrees, such as the Omatikaya, sleep in hammocks, or nivi. Nivi are woven on the sa’ewrang, cultivated from epiphytic plants that grow on Great Trees, depending on the type of hammock needed.
The Na’vi distinguish between the large swaynivi, which can accommodate entire families, and snonivi, which are intended for individuals.