Alejandro and Estevan Gutiérrez, two of four siblings, were raised by an Ecuadorian mother and a Swiss father in Switzerland, and often visited family in Playas, Ecuador.

[1][2][3] Around age nine, Estevan learned to play classical guitar in Latin styles such as milonga and salsa, and as a surfer was later inspired by surf rocker Jack Johnson.

[4][6][7] The band's first three albums (8 Años, El Camino de mi Alma, and Hoy Como Ayer) drew broadly from the world of Latin music.

[6][8][9] A visit to Mexico and the Southwest US in February 2020 inspired their fourth album, Hijos del Sol, which incorporated more Western sounds.

[5][8][12] The brothers have described having a musical chemistry such that they are able to compose together without needing to talk; NPR writes, "They weave intricate guitar lines over each other that intertwine to the point that if you close your eyes you can't tell where one begins and the other ends".