"The fashion supply chain is super fragmented and very dense," says Kathleen Rademan, director of the innovation platform at Fashion for Good, a non-profit working to make fashion more sustainable. "It's hundreds of hands that an item passes through before it comes into the consumer's hands." Often, retailers and brands themselves don't know exactly where the fabric in their products comes from. A 2019 Unece study found that only a third of the top 100 apparel companies track their own supply chains – and half of those only gather information as far as their immediate suppliers.

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