The album was primarily written and produced by Alejandro Sergi and Cachorro López, with further collaboration with Gabriel Lucena.

Six singles were released from the album: "Me Gustas Tanto", "Un Tiempo", "Casi Feliz", "Luna De Papel", "Entre Las Dos", and "Por Amar Al Amor".

[7][8] Souvenir is primarily a pop and electropop record, with elements from various musical styles, such as house, dancehall, disco, synth-pop and dub.

[10] He added that it is basically instrumented with machines and software, a few acoustic drums and guitars, "the rest is pure synth, sampling and digital processes".

[11] Shangay's writer Agustín Gómez Cascales praised Souvenir for "its luminosity" and for "the strength of its choruses", and described it as a "new delivery of bubbly and exquisite pop".