"Un mar de confianza" (A sea of confidence) is the eighth studio album of the Spanish singer-songwriter Luz Casal, released in the last quarter of 1999, after a four years long hiatus due to the death of her father.

[1] After suffering from personal problems due to the death of her father, "Un mar de confianza" shows feelings of loneliness, self compassion and sadness.

[2] Those feelings of loneliness and need for support are clearly shown in the first maxi single of this album entitled "Mi confianza" (My confidence),[3] a song that was arranged with acoustic guitars and soft drums.

[4] In the first months of 2000, Luz Casal released the following single from this album entitled "Sentir" (To feel), a track written and composed by Torres Muniz and Pedro Ayres Magalhaes, members of the Portuguese band Madredeus, in which the performer talks about the need of having the company of the most loved ones while there's still time left.

[6] The third single of this album was "Sumisa" (Submissive), a song with feminist lyrics which talk about the discrimination, violence and various humiliations that women still suffer in many aspects of life.