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Bolt Technology

MEET MYLOTM

For billions of years, mycelium has grown beneath our feet and served as 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. It brings sustenance to all living species and is the literal world wide web.

We developed Mylo by engineering mycelium into a material that is everything you love about leather without everything you don’t. Mylo is certified bio-based, meaning it’s made from predominantly renewable ingredients that can be found in nature. Soft, supple, and less harmful to the planet – Mylo is a sustainable alternative to leather that will become available to the world through our consortium partners.

Learn More

For billions of years, mycelium has grown beneath our feet and served as 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. It brings sustenance to all living species and is the literal world wide web.

We developed Mylo by engineering mycelium into a material that is everything you love about leather without everything you don’t. Mylo is certified bio-based, meaning it’s made from predominantly renewable ingredients that can be found in nature. Soft, supple, and less harmful to the planet – Mylo is a sustainable alternative to leather that will become available to the world through our consortium partners.

Learn More
The process begins with mycelium cells.
We grow the cells on beds of renewable, organic matter.
Billions of cells grow and form an interconnected 3D network.
We process the resulting network and tan and dye it to make Mylo.

Deep Science Meets High Design

The Mylo Consortium

Consortium (n.) – An association of two or more entities coming together to join forces and work together in achieving a common goal.

We never planned to change the world alone. In a resource-constrained world, the time has come to develop smarter solutions through advanced science and a shared commitment to a better future. Enter the consortium – adidas, Kering, lululemon, and Stella McCartney. Selected based on mission alignment, high standards of quality, and the ability to scale worldwide, these partners banded together to invest in meaningful material innovation with Mylo.

To deliver millions of square feet of Mylo, we have built a world-class supply chain that maintains Mylo’s high quality while continuously minimizing its environmental impact. Our European tanning partner has five generations of experience working with leather and meets top certifications in sustainability, including a gold rating from the Leather Working Group. Our mycelium partner is the world’s expert in growing mushrooms; they operate a state-of-the-art facility in the Netherlands that utilizes vertical farming to minimize their ecological footprint.

We Share Really Good Chemistry

Supply Chain + Partners

To deliver millions of square feet of Mylo, we have built a world-class supply chain that maintains Mylo’s high quality while continuously minimizing its environmental impact. Our European tanning partner has five generations of experience working with leather and meets top certifications in sustainability, including a gold rating from the Leather Working Group. Our mycelium partner is the world’s expert in growing mushrooms; they operate a state-of-the-art facility in the Netherlands that utilizes vertical farming to minimize their ecological footprint.

To deliver millions of square feet of Mylo, we have built a world-class supply chain that maintains Mylo’s high quality while continuously minimizing its environmental impact. Our European tanning partner has five generations of experience working with leather and meets top certifications in sustainability, including a gold rating from the Leather Working Group. Our mycelium partner is the world’s expert in growing mushrooms; they operate a state-of-the-art facility in the Netherlands that utilizes vertical farming to minimize their ecological footprint.

Bolt Product

FALABELLA PROTOTYPE X STELLA MCCARTNEY

In April 2018, we collaborated with designer Stella McCartney to create a prototype of her iconic Falabella bag, made with Mylo. The bag premiered at the Fashioned from Nature exhibit at the Victoria & Albert Museum in London.

In April 2018, we collaborated with designer Stella McCartney to create a prototype of her iconic Falabella bag, made with Mylo. The bag premiered at the Fashioned from Nature exhibit at the Victoria & Albert Museum in London.

Bolt Product

MYLO DRIVER BAG

This driver bag is the prototype for the first commercially-available bag made with Mylo in collaboration with Chester Wallace. The bag was fully funded in just 7 days through a Kickstarter campaign. Follow our delivery journey on Kickstarter.

This driver bag is the prototype for the first commercially-available bag made with Mylo in collaboration with Chester Wallace. The bag was fully funded in just 7 days through a Kickstarter campaign. Follow our delivery journey on Kickstarter.

Frequently Asked Questions

What is mycelium?

Mycelium is a sprawling, infinitely renewable, interlaced web, that threads through soil and old tree trunks, and plays a critical role in breaking down organic matter to provide nutrients to nearby plants. Mushrooms are the fruit of mycelium. Imagine the branches and vines that grow apples or grapes – mycelium functions like those twisting, branching supports just under the surface. It’s called “nature’s world wide web” as it brings sustenance to all living species and is the literal world wide web.

Is this leather?

No. The term “leather” is reserved for animal hides, and animal hides are made of collagen. Mylo is made from mycelium and does not contain any collagen. Learn more here.

How is Mylo made?

We start by reproducing what happens on the forest floor in a controlled indoor environment. We take spores of mycelia cells and feed them sawdust and organic material, and place it on a square mat while controlling the humidity and temperature. The mycelium grows into a foamy layer – imagine a big bag of smushed marshmallows. Once the mycelium is harvested, we compost the leftover byproducts. We then process and dye that sheet of mycelium and it becomes the Mylo that gets used to make footwear, handbags, wallets, phone cases, and other gorgeous products. Learn more here.

Where do you make Mylo?

Mylo is created by Bolt Threads, a U.S. material innovations company based in California. It is grown by expert mushroom farmers and scientists in indoor vertical farming facilities in Europe and the United States.

Is this the same technology you use to make MicrosilkTM?

No, our Microsilk technology involves engineering yeast to produce silk proteins. With Mylo, we grow mycelium, which we process into the final Mylo material.

Is Mylo genetically engineered?

No, we carefully control growth conditions like temperature and humidity to produce the final material.

How is Mylo more sustainable than leather?

It’s too early to have independent testing on Mylo’s carbon footprint, but creating a sustainable alternative to leather that checks the boxes for people who love leather is the whole point we’re doing this. Unlike leather production, making Mylo doesn’t involve raising livestock or emitting any of the associated greenhouse gases or material wastes. As disposable incomes rise around the globe, so will the demand for meat and leather goods. This demand simply can’t be met using the land and water it takes to raise cattle. We need smarter, more sustainable solutions. The mycelia we grow for Mylo is produced in days, without the resource intensity of raising livestock, which can take years. Mylo is certified bio-based under the German DIN Geprüft standard. Learn more here.

How is Mylo more sustainable than synthetic leathers?

Unlike synthetic leather, which is usually made from a synthetic fabric and a polyurethane or PVC coating, Mylo is made from mycelium and is not petroleum-derived. Additionally, Mylo’s processing and finishing chemistries are intentionally evaluated and selected using Green Chemistry principles. We will undertake a full life cycle analysis of Mylo prior to large scale commercial rollout, and we look forward to sharing those findings with the world. Learn more here.

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Disclaimer: We know learning about the potential of biomaterials can inspire a wealth of ideas and we love your creativity. Before you send us your awesome ideas, please know that we don't want to accidentally come up with an idea similar to yours, so any concept you email us will become the property of Bolt Threads Inc.