Vestir santos literally translates to "to dress saints". It's a colorful Spanish idiom used to describe a woman who remains a spinster or an old maid, supposedly because her main task becomes dressing the statues of saints in the church.
In the song, Shakira critiques societal pressure by singing that women who don't marry before thirty will be left to vestirán santos, highlighting the traditional expectation for women to marry young. It's a fantastic, culturally rich phrase that captures the song's rebellious spirit.
Ever feel like society has way too many rules? Shakira definitely did when she wrote this song. "Pies Descalzos, Sueños Blancos" is a fun, sarcastic look at how much we've complicated our lives. She starts by reminding us that we came from an "raza antigua / De pies descalzos y de sueños blancos" (ancient race / of barefoot people and white dreams), a simpler time when we were more natural and free. She argues that we chose this path, that we "mordiste la manzana / Y renunciaste al paraíso" (bit the apple / and gave up paradise) and created a world full of rigid expectations.
Then she just lists all the ridiculous rules we're supposed to follow, and it's a long list! From "Ponte siempre zapatos" (Always wear shoes) to the idea that "Las mujeres se casan / Siempre antes de treinta" (Women always get married / before thirty). She contrasts this perfectly calculated world with her own personality, calling herself "un caos completo" (a complete chaos). It's a call to remember our more natural, barefoot selves and to question the strict social pressures we face every day.