From the search results, it seems that there is no specific information available about the positive or negative aspects of the Tara Jarmon nouvelle collection. However, there is some information available about the materials used in the collection. Here are some details:

• Leather bags: The leather bags are handcrafted in Italy in a special workshop specialized in leather goods. The leathers used come from factories that insure a sustainable.

• Materials: The collection plays with details, colors, and materials, which are now even more extensive to allow timeless essentials to be reimagined. However, there is no specific information available about the materials used in the collection.

• Dresses: There are some dresses available in the collection, such as the Rosabelle green double canvas dress and the Ruodana red crepe dress. The Rosabelle dress is made of double-faced canvas, while the Ruodana dress is made of vermillion crepe.

Overall, while there is no information available about the positive or negative aspects of the Tara Jarmon nouvelle collection, it seems that the collection features leather bags and dresses made of high-quality materials.