The Smithsonian National Zoo in Washington, D.C., will soon be home to pandas once again.

Two 3-year-old panda bears, Qing Bao and Bao Li, have left the research base in Dujiangyan, China, and are ready for their journey to the United States. The pandas will fly aboard the specially chartered FedEx Boeing 777 cargo jet dubbed the “Panda Express.” Their departure is set for Monday.