Our material challenges encourage the industry to set ambitious sourcing targets.

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Cotton and polyester are two of the most used fibers in the fashion and textile industry, but both come with their own sustainability issues to overcome. That’s why we’re asking companies to set themselves targets to source more responsible solutions through our material challenges.


Take part in a material challenge

The 2025 Sustainable Cotton Challenge

The 2025 Sustainable Cotton Challenge encourages brands and retailers to commit to sourcing 100% of their cotton from more sustainable sources by 2025.

Take part

The 2025 Recycled Polyester Challenge

The 2025 Recycled Polyester Challenge presses the industry to commit to bringing the market share of recycled polyester up from 14% in 2019 to 45% by 2025.

Take part


Accelerating the adoption of more responsible materials is just the first step

Our aim is for more sustainably sourced cotton and recycled polyester to replace their conventional counterparts, rather than substitute other types of materials or justify increased industry growth. This, coupled with investment in innovation, the scaling of existing solutions, and an emphasis on degrowth, can help us reach our Climate+ goals on time.


We’re tracking progress, together

Each year, participating companies report their cotton or polyester consumption through our Materials Benchmark, allowing us to track progress towards the 2025 goals. All the information is anonymous and aggregated across all the participants in the annual challenges dashboard. Your company information will never be singled out and published without your company’s explicit request or consent.


Explore our Materials Benchmark

We’ve created a common framework for brands to report on their progress in sustainable materials sourcing.