Meet Mylo™

The allure of leather with a sustainable transformation. Made from mycelium — the complex latticework of underground fibers so strong they hold the planet together — Mylo is soft, supple, and less harmful to the environment.

Mylo is made possible by the world-class scientists and engineers at Bolt Threads™.

Products made with Mylo will be available from adidas, lululemon, Stella McCartney, and more starting in 2021.

Why Unleather™?

Leather has served humans for centuries. But people evolve, and so should our materials.

In our resource-constrained world with a growing population, we are overdue for a renewable, sustainable alternative to leather. The time is now to embrace new frontiers of possibility and unleather the products we use every day.



The radical act of choosing products made sustainably with infinitely renewable mycelium over animal and synthetic-based materials.

Deep Science Meets High Design

Magical thinking meets radical intention. This is a mission that never compromises what's possible for what's easy or accepts the old way as the only way.

Enter the Mylo consortium — a group of world-class companies investing in meaningful material innovation.

Intentionally selected for their exceptional product quality, impactful global reach, and proven commitments to innovation and sustainability, these companies are coming together, across competitive lines, to help create a more sustainable future for fashion.

The Mylo consortium is adidas, Kering, lululemon, and Stella McCartney. Products made with Mylo will be available for purchase starting in 2021.

Familiar Material, Radically Transformed

Mylo can be used like animal or synthetic leather, and can take on any color, emboss, or texture.

Substantial, supple, and soft. Mylo has an unmistakable resemblance to animal leather, but with an unbelievably low environmental impact.

Limited Release Mylo Driver Bag (in Black) made with Chester Wallace

Limited Release Mylo Driver Bag (in Black) made with Chester Wallace

A community of visionaries and global supply chain partners – who share really good chemistry – have honed Mylo into a material that looks and feels just like leather.

Across fashion and sportswear, Mylo is now in the design studios of industry leaders.

From the Earth, For the Future

For billions of years, mycelium has grown beneath our feet and served as an ecological connective tissue. A sprawling, infinitely renewable, interlaced web, it threads through soil, plant bodies, and along river beds to break down organic matter and provide nutrients to plants and trees.

Mushrooms are the fruit of mycelium. Much like the branches and vines that grow apples or grapes, mycelium functions like these twisting, branching supports just under the Earth's surface.

On a mission to harness the promise of advanced materials science, a team of visionary scientists and engineers at Bolt Threads have developed a state-of-the-art process to grow and transform mycelium into a​ high-quality alternative for animal and synthetic-based leather.

The process begins with mycelium cells grown on beds of sawdust and other organic material. Billions of cells grow to form an interconnected 3D network which is processed, tanned, and dyed to make Mylo.

All of the Leather, None of the Animal

Mylo consumes significantly less land and emits fewer greenhouse gases than raising livestock.

The mycelium used to make Mylo is grown from mulch, air, and water in just a few short weeks, versus the years it takes to raise cattle. Mylo is certified bio-based, which means it’s made predominantly from renewable ingredients found in nature today.

Using Green Chemistry principles, Mylo is created through a highly efficient process that is rigorously designed to reduce environmental impact from start to finish. Mylo supply chain partners meet top sustainability certifications.


These statements are based on bio-based testing and certification by DIN CERTCO, and preliminary environmental impact calculations. In 2022 a full LCA will be released to provide a deeper view into Mylo's impact. Read more about Mylo's impact measurement approach here.

UNLEARN the ways and materials of the past to begin a new future.

UNEARTH the magic of the natural world to create solutions as remarkable as they are renewable.

UNLEASH the power of advanced materials science.

UNLEATHER and join the journey where science and sustainability lead the way.