Celium™ Returns: Polybion & GANNI’s Second Leap into the Paris Fashion Week F/W 2025

Polybion proudly returns to Paris Fashion Week for a second consecutive season, advancing our mission with Celium™—our Premium Cultivated Cellulose. In continued collaboration with GANNI, Polybion is steadily turning the vision of a responsible, aesthetically innovative future in fashion into reality.

This season, the focus is on two striking XXL Hobo Bags, one in Oil Green and the other in Blackberry Wine (See look 22 and 28). Every step on the runway stands as a testament to Polybion’s commitment: progressing one cell at a time, yet with unwavering determination. This marks a new chapter where innovation meets passion, and responsible luxury takes center stage.

The Science of Scale: Iteration Requires Volume

To create a luxury piece that defies convention, the process begins long before it ever meets the eye on the runway. Iteration requires scale, and iteration is the backbone of every piece you see on stage. For this Paris Fashion Week, we provided GANNI with close to 50 grown-to-order sheets, which resulted in 12 prototypes through rigorous testing and creative exploration—until, in the end, only 2 bags advanced to the runway this time. 

Every iteration, test, and adjustment represents not just a step toward a showcase piece, but a leap toward the market-ready products that redefine the benchmarks of responsible luxury and signature aesthetics. This journey is a collaborative challenge where innovators like Polybion and brands like GANNI work side by side, investing time, human ingenuity, and resources to discover the perfect match for each application. Scaling biomaterials takes time, often longer than expected, which is why commitment from all stakeholders is essential. This runway marks another chapter in the evolving story of Celium™ in the most important fashion week on the planet.

At Polybion, we cherish our partnership with GANNI, one who truly comprehends the arduous yet rewarding process of bringing new materials to the world’s most prestigious runway. We’re excited for the surprises and projects that lie ahead later this year.

Redefining Signature Aesthetics, Versatility and Performance

Celium™ isn’t designed to be a mere replica of what came before, it’s engineered and designed to set new standards through science, biology and iteration. Our biomaterial carries an intrinsic uniqueness; no two pieces are identical.This gives Celium™ a distinctive signature unmatched by any alternative.

Since last season, Celium™ has been making waves across the fashion scene, evolving through creative applications that span from small bags to oversized designs, jorts, and vests. Our previous Paris Fashion Week collaborations with GANNI revealed a dynamic range of fashion pieces—from vibrant, bacterial-marked canvases in brilliant yellows, blues, and baby pinks that captured the exuberance of summer, to iconic looks like the baby pink crop top, chic miniskirt, and hallmark Bou Bag. 

This season, however, the focus has shifted to a more refined aesthetic: one striking XXL Hobo Bag in a uniform Oil Green, exuding understated elegance for autumn/winter collections, and another in a rich Blackberry Wine. These selections not only highlight Celium™’s exceptional versatility across seasons but also demonstrate that premium performance, exceptional aesthetics, and uniqueness are the outcomes of biology, meticulous scientific innovation, and the consistent collaborative work between brands and material innovators.

Celium™ has achieved a level of performance that allows it to seamlessly adapt to a wide range of design visions, thanks to years of collaboration with global brands and a relentless process of scientific refinement, a result of precision, not coincidence.

Celium™ an epic saga of creative persistence

Behind every piece of Celium™ lies an epic saga of scientific achievement and creative persistence. The scale of production, the precision of its processes, and the artful transformation from waste to high fashion pieces are all threads woven into the tapestry of Celium™.

Polybion believes in a future where sustainable innovation is not a compromise, it is the  new gold standard of forward-thinking design and materials. With groundbreaking collaborations both public and private, upcoming announcements, and continuous evolution, Celium™ is poised to encourage other fashion brands to lead with vision and inspire with action.

Join the vision and inspire action.