In October 2021, Better Cotton received funding from the Swiss State Secretariat for Economic Affairs SECO through the ISEAL Innovations Fund to explore the various due diligence system controls sustainability systems apply to blended / mixed materials through their Chain of Custody (CoC) systems.

The objective of the project was to identify the key controls used by sustainability systems to manage blending / mixing risk in different sectors, the contexts these mechanisms work in, and the pros and cons of use.

This report summarises the research and key conclusions drawn through this project.