Stella McCartney launches world’s first-ever garments made from myloTM mycelium leather
Stella McCartney working with MyloTM


Stella McCartney is the first luxury house in the world to launch garments created with MyI0TM by Bolt Threads - a vegan, sustainable, animal-free leather

Stella McCartney is the first luxury house in the world to launch garments created with MyI0TM by Bolt Threads – a vegan, sustainable, animal-free leather alternative made from mycelium, the infinitely renewable underground root system of fungi.

Combining deep science with high-fashion design, the two garments show the potential of this next-generation material and pave the way for future commercial offerings.

In October 2020, Stella McCartney was announced as part of an exclusive consortium of brands working with MyloTM, exploring its uses and providing critical feedback to the Bolt Threads team.

Stella McCartney working with MyloTM

“I believe the Stella community should never have to compromise luxury desirability for sustainability, and MyloTM allows us to make that a reality. These rare, exclusive pieces embody our shared commitment with Bolt Threads to innovate a kinder fashion industry -one that sees the birth of beautiful, luxurious materials as opposed to the deaths of our fellow creatures and planet,” says Stella McCartney.

“Creating new, high-quality biomaterials is a major technological challenge and a massive opportunity for people and planet. I am incredibly grateful and humbled by Stella and her team for their long-term partnership and support in bringing MyloTM to the world. The material used in these two garments not only represents a huge step forward in both aesthetics and performance of biomaterials, but also marks the beginning of the rollout of product-ready MyloTM. This is tangible progress toward large-scale production where MyloTM can make a significant positive impact on our planet,” says Dan Widmaier, CEO and founder of Bolt Threads.

Stella McCartney working with MyloTM

The two MyloTM garments are entirely unique and cruelty-free, including a black bustier top and utilitarian trousers informed by Stella’s effortless sensuality and signature dichotomy of feminine and masculine attitudes.

Both were handcrafted from panels of the mycelium-based material laid on recycled nylon scuba at the brand’s atelier in London, combining an avant-garde perspective with an athleticism aligned with both its Summer 2021 and Autumn 2021 collections.

While neither of these pieces are for sale, Stella will integrate MyloTM into future seasonal offerings.

Inspired by its McCartney A to Z Manifesto and 20th anniversary in 2021, Stella McCartney is more committed than ever to bringing a conscience to the fashion industry – having never used leather, feathers, fur or skins since day one. Stella and Bolt Threads have been partners in sustainable innovation since 2017, and the luxury house has been part of the MyloTM journey since its inception.

The first product ever created with MyloTM was a prototype of Stella’s iconic Falabella bag, which debuted as part of the V&A’s Fashioned from Nature exhibition in 2018.

Stella McCartney working with MyloTM

Remarkably similar to animal leather yet designed to reduce environmental impacts, MyloTM is a soft, substantial material that is certified bio-based, meaning it is made predominantly from renewable ingredients found in nature today. Mycelium is regenerative and thrives
abundantly in the wild feeding on natural resources. Scientists at Bolt Threads have learned how to reproduce what happens under the forest floor, where mycelium grows best, in a lab to create MyIoTM with mulch, air and water – spawning an entirely new category of material science.

This state-of-the-art process is designed to have a minimal environmental impact and takes days, not years like raising cattle. It requires 17,000 litres of water to produce a kilogram of leather, with animal agriculture accounting for approximately 18% of global greenhouse gas emissions and driving the destruction of vital ecosystems; 70-80% of the Amazon’s deforested area is now used for cattle pastures. MyIoTM is also not petroleum-based, unlike synthetic leathers, meaning more fossil fuels can be kept in the ground and less plastic is deposited into landfills and oceans.



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