There is no specific information about the Aura fragrance product in the search results. However, here is some general information about fragrance products, their ingredients, and their positive and negative aspects:

Ingredients or materials:

• Fragrance products contain dozens of ingredients, which are not required to be disclosed individually on the label due to proprietary information.
• The International Fragrance Association (IFRA) sets safety standards and regulations for the fragrance industry, but some fragrance chemicals lack substantial research and safety data, and some have been associated with serious negative health effects.
• Fragrance compounds can be natural or synthetic and belong to several families.

Positive aspects:

• Fragrance products can provide a pleasant scent to the user and those around them.

Negative aspects:

• Fragrance products can contain potentially harmful chemicals that lack safety data.
• Some people may be allergic or sensitive to certain fragrance ingredients.
• Fragrance products can be rated poorly on the Think Dirty app, which rates products based on their potential health impacts.

Overall, it is important to be aware of the ingredients in fragrance products and their potential health impacts.