Japanese biotech start-up Spiber has been joined in a “biosphere circulation” initiative by long-standing brand partners Goldwin and Pangaia, the company has announced.

Both have agreed to supply their unwanted textiles and apparel as feedstocks for Spiber’s microbial fermentation process, out of which it produces its novel Brewed Protein polymers and fibres. Agricultural by-products are another source of important ‘end-of-use nutrients’, which the start-up upcycles into biodegradable proteins via proprietary technology. The resulting material is microbially digestible, forming part of what Spiber calls a “circular ecosystem”.

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