des nouvelles bottes/ de nouvelles bottes

Hi  Titilayo,

As I see it, the bottes (boots) are a specific and countable noun.

So we have the plural definite article being used here (jalouse de(preposition) + les --> des)

This is not the Indefinite des that would contract to de before an adjective.

I think that this is the answer to your query.

Hope it helps.

Jim