Our services are now available in Australia, Belgium, Denmark, Ireland, the Netherlands, Portugal, and Sweden.

Our services are now available in Australia, Belgium, Denmark, Ireland, the Netherlands, Portugal, and Sweden.

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High performance meets ultra-sustainability.

High performance meets ultra-sustainability.

Durability. Performance. Sustainability. Pick all three.

In the past, runners have faced a familiar dilemma: durability, performance, sustainability – pick two. Sure, you can choose a sustainable, comfortable shoe, but it might only last 150 miles. That’s not good enough. That’s why we developed CircleCELL™, the first high-performance midsole material made entirely from renewable feedstock, including recycled organic waste, to deliver elite energy return and incredible durability, while minimizing environmental impact. This is more than a material breakthrough; it’s a decisive step toward circular design and uncompromised sustainability.

Created through a process of advanced supercritical foaming, CircleCELL™ delivers energy return on par with PEBA, with almost double PEBA's running lifespan. Beneath your foot, it feels responsive, comfortable, and ready for any terrain and any distance.

This combination of performance, durability, and sustainability is already reshaping what runners demand of a shoe. In January 2025, ultrarunner and race director Jamil Coury ran more than 730 miles outside an Arizona restaurant, in a competition to win a year’s supply of free burritos. Over 600 of his winning miles were logged in a single pair of Mount to Coast H1s with CircleCELL™ technology. His story proves that sustainability is like the guac on the burrito – the icing on the cake that turns good, to great.

Each CircleCELL™ midsole is manufactured through a process certified by REDcert² and ISCC PLUS and up to 20 pounds (9 kilograms) of organic waste and residual biomass is converted into a pair of midsoles. Every step in CircleCELL™ is a demonstration that what we throw away can carry us forward.