In "Bandera" ("Flag"), Aterciopelados speak out on immigration, another issue close to home. "We have toured across the world many times, yet every time, certain countries give us so much trouble when entering", Echeverri explains. "My problems with traveling are so small compared to others across the world but I thought I could give all these people a voice." The album's guests range from rapper Gloria "Goyo" Martínez (of Colombian hip hop act Choc Quib Town) on "28", to the Andean group Kapary Walka on "Madre" ("Mother") and "Aguita" ("Little Water"), and even include Echeverri's daughter on "Ataque de Risa" ("Laughing Fit"). Aterciopelados launched an extensive tour of the United States in April 2009 in support of "Rio".