Approved materials may be less expensive than preferred materials, but may not be as ethical or sustainable as Preferred materials in their production. Even when using Approved materials, certain standards and guidelines should be followed to ensure minimising negative impacts.

Discouraged materials may be made from synthetic or non-renewable resources, and may be produced using methods that have a high environmental, animal or social impact. While these materials may be less expensive or easier to work with than other options, they may not be the most sustainable or ethical choices for clothing production, and may be problematic from a traceability and compliance perspective.