"They never have clean soles."

Translation: Ei nu au niciodată tălpile curate.

[JonEnMiljon]

I got corrected for ”tălpi curate”. Does it have to be a definite article here?

[ovidiu_nl]

I think "tălpi curate" should also be accepted.

[FloricaEnciu]

Why it is not correct "tălpi curate "