Ambercycle’s CEO on Why Traditional Recycling Won’t Work, and What His Technology Does Instead

Camay Abraham
Camay Abraham is a journalist, researcher, and a freelance reporter for dot.LA. She covers fashion, tech and culture and has previously written for Glossy, i-D, Dazed and Screen Shot, among other outlets. She has an MA in fashion psychology from London College of Fashion and has been interviewed by Vice and ABC Australia for her work in fashion and well-being. Pronouns: she/her.
Ambercycle’s CEO on Why Traditional Recycling Won’t Work, and What His Technology Does Instead

Few industries are as tangled with buzzwords as the fashion industry. Clothing brands, rightly concerned about their tremendous effects on the environment, are eager to call their collections “green” or “sustainable.” But making tangible changes in how clothing is produced and distributed has been a struggle.

On Tuesday, L.A.-based startup Ambercycle announced it raised a $21.6 million Series A round to try to tackle the problem. The funding comes from fashion heavyweights including H&M (which has used its technology in recent collections) and online fashion and shoe retailer Zalando, among others. It will go to ramping up production of the company’s fiber regenerative technology, which it created and piloted in a manufacturing plant downtown.


Ambercycle co-founders Shay Sethi and Moby Ahmed are scientists and former UC Davis college roommates. The two see themselves as different from traditional fashion or manufacturing founders – and other research-based innovators.

“Traditionally, people have always thought, ‘here's an interesting technology, how do we craft a story around it?’” Instead, Sethi says, Ambercycle “start[s] with the products that we would really like to see and then work backwards into the technology. We develop, do research and engineering that way instead of starting in the lab.”

Ambercycle CEO and co-founder Shay Sethi

Ambercycle CEO and co-founder Shay Sethi

Their technology is able to break down the components of clothing to its basic polyester materials, separating its natural fibers and dyes, and creating a new material in the process, which they call cycora.

“We imagined a technology that could take an old t-shirt and turn it back into the yarns required to make that green t-shirt again,” he adds. “Anything that's in your closet today – like yoga pants or dress shirts – that's traditionally made of polyester can be made with cycora.”

Sethi and Ahmed started their company in San Francisco in 2015, then moved it to Los Angeles’ garment district two years later, looking for a manufacturing hub close to a center of innovation.

“We felt like this is a really good nexus for innovation, fashion – as well as material sciences,” Sethi says. “There is a very strong industry and a very strong familiarity with manufacturing so we felt it was a perfect blend. Also we grew up in California and didn't want to leave.”

We chatted with Ambercycle co-founder Shay Sethi about his company’s journey, its new funding and how it plans to get beyond buzzwords in planning a sustainable future for fashion.

What are the biggest challenges to the fashion industry?

When we consider the future of humanity, there's a couple key things that need to change. The big one is – given that consumption will not decrease – the reliance on natural resources will put a strain on the way in which we can live on this planet. So in order to change that, we need to take advantage of these traditionally viewed as waste streams and turn them back into new resources. So the future upstream will be all of these textile materials that are in our closet. But it's not really easy today to throw away or recycle our old garments.

We need to be able to have a low-friction way to throw away our garments and have them go back into a circular system. If we can tell a transparent and traceable story to a person, then brands and retailers will start to care.

Why is it so hard to recycle clothing currently?

So let's talk about our clothing. They are mixtures of different fibers – polyester and cotton, as well as dyes, additives, zippers, tags and stains – when they're at their end of life. We can't really recycle those materials, because they're these complex, intimate blends. Recycling has really struggled as a business, and also as a solution to waste, because you can't create a high quality product from those materials once they are at their end of life.

How is Ambercycle different from other recycling processes?

Most recycling processes are shredding or very simple mechanical processes. You can turn a t-shirt into pillow stuffing in a similar way that you can turn paper into a sort of grey newspaper and then downcycle it; The same thing happens with textiles.

The Holy Grail is really being able to turn an old t-shirt into a new t-shirt. So over the past five years, we’ve developed technology that takes these mixtures of materials that have dyes and additives, put them through a process, and make the base raw materials needed to make those same yarns. This goes in line with what's traditionally known today as circular economy where you can reuse materials, again and again.

Will Ambercycle always be focused on apparel?

Right now our focus is on apparel.

We have a couple of luxury clients that are really interested in transitioning to circular systems. Over the next couple of years, we're going to be able to talk about those, but the major message we want to help shed light on is that every year, over 120 billion garments go to landfill. We need to, as a fashion industry, transition to a circular system. It's [not] just one or two companies that can do things; Everyone as a whole needs to adopt a new ecosystem, where things are being reused in supply chains over and over again. It's very important for this transition to involve all verticals in the power supply chain. The demand for these materials is already so high. So people already care. I think we're just trying to figure out the logistics of the society right now.

There's a lot of possibilities when you think about it. You can imagine this being transformed into a system that can take other materials as well. I think we're excited about the possibilities in the future but I’m really focused on the textile-to-textile stories today.

What do you plan to do with your recent funding?

We’re trying to scale up the number of projects we're doing with different companies across the apparel industry that will require a lot of manpower or womanpower. That's a key gap we need to fill. A technology like ours that uses sort of molecular separation technologies, that advanced material science requires a sort of scale before you can really start to see the fulfillment of these contracts.

It's very easy to make a couple of t-shirts, but it's very hard to make millions and millions and millions of kilograms of stuff. We're going to be scaling up production of one of our main materials today, cycora. Demands are already way through the roof. I felt like right now was the right time to raise external capital to accelerate that plan.

This interview was edited for clarity and brevity.

How to Navigate LA Tech Week 2026

🔦 Spotlight

Happy Friday, Los Angeles.

Next week, hundreds of tech events will take over the city, bringing founders, investors, engineers and creators together from October 12 through 18.

Calling LA Tech Week a conference does not quite capture the experience.

Presented by Andreessen Horowitz, Tech Week is a decentralized collection of panels, workshops, demonstrations and gatherings hosted independently by startups, venture firms and technology companies. There is no convention center or central stage. The programming stretches from Santa Monica and Venice to Culver City, Downtown, El Segundo and beyond.

In other words, the city is the venue.

AI remains the dominant theme for 2026, appearing across enterprise software, healthcare, finance, media and the creator economy. The schedule also reflects industries where Los Angeles has built a particular advantage, including aerospace, defense, robotics, advanced manufacturing, entertainment and consumer technology.

That range is what makes LA Tech Week distinct. It brings together the software companies shaping what comes next with the industries that already define Southern California.

The challenge is deciding where to show up.

Our advice: apply early and organize your schedule by neighborhood. Crossing from Santa Monica to Downtown may look manageable on a calendar created by someone who has never driven in Los Angeles.

To help you spend more time meeting people and less time crossing the city, we have organized each day’s events by location:

You can also browse the complete official LA Tech Week calendar.

Plan carefully, but do not fill every minute. The best conversation of the week may be the one that was never on your calendar.

More from this week’s LA startup and venture scene below.

🤝 Venture Deals

    LA Companies

    • El Segundo-based Gallatin AI raised a $50M Series A from new and existing investors including 8VC and Silent Ventures, bringing its total funding to $70M. The defense technology startup will expand its engineering team and advance Navigator, an AI platform that helps U.S. military units coordinate vehicle readiness, supplies, medical logistics and other mission-support operations. - learn more
    • Pasadena-based quantum computing startup Oratomic raised a $475M Series B at a $5.4B valuation, just three months after its Series A. ARCH Venture Partners, Spark Capital, Khosla Ventures, Index Ventures, General Catalyst and Bezos Expeditions co-led the round, bringing Oratomic’s total funding to $775M as it works toward a commercially viable, fault-tolerant quantum computer by 2030. - learn more
    • Torrance-based Fortastra raised a $30M Series A led by First In, with participation from Upfront Ventures, Space Capital, Rsquared, Side Door Ventures, ATX Ventures and existing investors. The company will use the capital to develop its next-generation maneuverable spacecraft, expand its engineering and operations teams and scale production of systems designed to protect critical assets in orbit. - learn more
    • Parallel Systems raised a $100M Series C led by AVP, with participation from Hillspire, Agility Global, Cobalt Capital, Anthos Capital, Congruent Ventures, Riot Ventures and Collaborative Fund. Founded by former SpaceX engineers, the company will use the funding to scale production and commercial deployment of its autonomous, battery-electric Panther rail vehicles, which are designed to make short-haul freight more competitive with trucking. - learn more
    • Gaming studio Gardens Interactive secured more than $35M in a Series B led by Lightspeed, with participation from Sequoia Capital, Index Ventures, Accel, Innovation Endeavors, Zenith Capital and other investors. The company will use the funding to launch and operate its debut social role-playing “strandbox” game, an evolving multiplayer world shaped by players’ actions and interactions. - learn more
    • Outer Spaces raised an $8M pre-seed round led by Upfront Ventures, with participation from Unlock Venture Partners, Mucker Capital and Genius Ventures. The startup is developing outdoor furnishings with integrated solar panels and batteries, turning backyards into sources of clean energy and backup power. - learn more
    • Furientis raised a $25M seed round led by Benchmark at a reported $125M valuation, following a $5M pre-seed announced in May. The defense startup will use the capital to scale production of lower-cost missile interceptors designed to be assembled quickly with readily available components, with a long-term goal of producing 1,000 systems annually at each factory. - learn more
    • Hiyo raised a $20.8M Series B led by Constellation Brands, with returning investor Live Nation also participating. The nonalcoholic beverage company will use the funding to expand its adaptogen- and nootropic-infused social tonics across more than 13,000 retail locations while growing its presence at hospitality venues and live events. - learn more
    LA Venture Funds
    • Navitas Capital participated in Vesta’s $30M Series B, which was led by Conversion Capital and included backing from several major mortgage lenders and financial institutions. The company will use the funding to scale its AI agents across mortgage origination, automating tasks such as application reviews, underwriting decisions and closing-document checks. - learn more
    • MTech Capital led Nettle’s oversubscribed $4.8M seed round, with participation from Project A Ventures, Sure Valley Ventures, Portfolio Ventures and Ventures Together. The insurtech startup will use the funding to expand across the U.S. and Europe while growing its AI platform, which helps commercial insurers identify property risks, accelerate inspections and generate reports. - learn more
    • Bonfire Ventures doubled down on Santé by participating in the company’s $15M Series A, which was led by FINTOP and included other returning investors. The New York startup will use the funding to expand its AI-powered operating system for independent wine and liquor stores, which combines point-of-sale, e-commerce, payments, inventory and marketing tools in one platform. - learn more

    LA Exits

    • Winnow Solutions was acquired by Marina del Rey-based Spring Labs, with financial terms undisclosed. Winnow’s attorney-built library of more than 100,000 state and federal regulatory requirements will become a core part of SpringGRC, helping financial institutions connect changing laws directly to their compliance policies, controls and workflows. - learn more

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      LA Tech Week 2026: Sunday’s Event Lineup

      🔦 Spotlight

      LA Tech Week 2026 closes Sunday with one final day of events across Los Angeles. We have organized the remaining lineup by neighborhood so you can finish the week with a few last conversations before everyone returns to their regularly scheduled inboxes.

      ARTS DISTRICT

      12:00 PM

      CARSON

      12:00 PM

      CULVER CITY

      9:00 AM

      • Women in Cleantech & Sustainability Hike and Network: See Details Here
        Women in Cleantech & Sustainability

      6:00 PM

      • Founders pitch competition: See Details Here
        Biomorphix solutions, Nightingale regenerative

      HOLLYWOOD

      10:00 AM

      4:00 PM

      • AI International: Film, Music Video & Micro-Drama: See Details Here
        AI International Film Festivals

      MID CITY

      1:00 PM

      OTHER

      12:00 PM

      • ORGANIC LIFE LABS™ PRESENTS THE ALIGNMENT LAB: The Science of human performance: See Details Here
        The Blue Room Collective

      SANTA MONICA

      8:00 AM

      1:00 PM

      6:00 PM

      SOUTH LA

      2:00 PM

      • Future Builders : Family STEM Day: See Details Here
        Black L.A. Tech Week (Community Collective)

      VENICE

      10:00 AM

      12:00 PM

      • How to Raise Funds to Fund Any Business Using Digital Products.: See Details Here
        DN Events

      VIRTUAL

      5:00 PM

      WEST HOLLYWOOD

      3:00 PM

      Each session provides unique opportunities to gain insights, network, and explore various fields of tech innovation. For updates or more event information, visit the official Tech Week calendar.

      Download the dot.LA App

      LA Tech Week 2026: Saturday’s Event Lineup

      🔦 Spotlight

      LA Tech Week 2026 heads into the weekend Saturday with more opportunities to learn, meet fellow builders and explore what is being created across the region. Browse the day’s events by neighborhood below and find the gatherings worth leaving the house for.

      ARTS DISTRICT

      5:30 PM

      BEL AIR

      5:00 PM

      CULVER CITY

      10:00 AM

      1:00 PM

      4:00 PM

      DOWNTOWN

      11:00 AM

      2:00 PM

      • South Asians in Space, Physical AI: See Details Here
        american south asian network

      5:00 PM

      7:00 PM

      HOLLYWOOD

      8:00 PM

      INGLEWOOD

      10:00 PM

      LONG BEACH

      10:00 AM

      12:00 PM

      LOS FELIZ

      8:30 AM

      • Griffith Observatory Hike with Longevity Cities & Don't Die LA: See Details Here
        Longevity Cities

      MALIBU

      5:00 PM

      MARINA DEL RAY

      9:30 AM

      • The Brazen Capital Walk: Connecting Women, Capital & Opportunity: See Details Here
        BrazenEra

      6:00 PM

      • Build an AI workflow editor, natively in Angular: See Details Here
        Workflow Builder

      SANTA MONICA

      7:00 AM

      • Founders Running Club Run in Santa Monica: See Details Here
        Founders Running Club, MongoDb

      9:00 AM

      • MOLTEN - Spatial hackathon (ElevenLabs, AssemblyAI, Rokoko, Datafeel...): See Details Here
        Field Lab

      2:00 PM

      3:30 PM

      6:00 PM

      7:00 PM

      SOUTH LA

      7:00 PM

      THE VALLEY

      7:30 PM

      UCLA

      11:00 AM

      USC

      9:00 AM

      10:00 AM

      10:30 AM

      VENICE

      8:00 AM

      • Open Air Health Tech: See Details Here
        Open Air Health Tech, Bowshock, Govitamins App

      10:00 AM

      10:30 AM

      11:00 AM

      12:00 PM

      6:00 PM

      • Bots, Bytes & Bubbles Benefit: See Details Here
        Distinguished Minds Institute dba thinqueBytes®

      VIRTUAL

      9:00 AM

      • Ask a VP of Sales: Live GTM Office Hours for Early-Stage B2B Founders: See Details Here
        Kat Rucker Consulting Group

      11:00 AM

      WEST HOLLYWOOD

      11:00 AM

      • The 10x Engineer Showed Up. The 10x Organization Didn't.: See Details Here
        Workflow Builder, Tentaro

      3:00 PM

      WESTSIDE

      11:00 AM

      2:00 PM

      • Graphic Design & Digital Printing Meetup: See Details Here
        Big Frog Custom T-Shirts & More of West LA

      7:00 PM

      WESTWOOD

      12:00 PM

      Each session provides unique opportunities to gain insights, network, and explore various fields of tech innovation. For updates or more event information, visit the official Tech Week calendar.

      Download the dot.LA App

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