Stella McCartney Partners with Balena’s BioCir®Flex on  S-Wave Sport Trainer

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We are thrilled to announce a landmark collaboration with Stella McCartney, a trailblazer in sustainable fashion. The partnership features Balena’s innovative material, BioCir® Flex, in Stella McCartney’s highly anticipated S-Wave Sport trainers, debuting as part of the Autumn 2025 collection and set for release in April 2025.

BioCir® Flex, a compostable, recyclable, and bio-based alternative to conventional plastics, exemplifies the shared vision between Balena and Stella McCartney: combining innovation and circularity to create truly sustainable design.

BioCir® Flex is a next-generation material that combines high-performance capabilities with environmental responsibility

Compostable & Recyclable

esigned for circularity, BioCir®Flex biodegrades into renewable biomass when composted in industrial facilities or can be recycled for continuous use.

Bio-based Innovation

Made from sustainable sources like castor beans, oils, and polysaccharides, ensuring it does not compete with food resources.

Dyed Naturally

The S-Wave Sport trainers incorporate BioCir®Flex dyed with natural cinnamon, highlighting its non-toxic properties.

Durable & Flexible

As durable as TPU and as flexible as rubber, it absorbs impact and responds to motion, making it ideal for footwear.

“I mean this is insane. My shoe designer came up to me and said, ‘smell the sole’. It’s made of cinnamon waste. It smells of cinnamon! And it's basically 100% plant based, recyclable and biodegradable textile. Its a closed-loop production, so it ensures completely zero waste. It is mindblowing.”

[ Stella McCartney ]

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The Stella McCartney S-Wave Sport trainers featuring BioCir® Flex will launch globally in April 2025.

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