Collection: Sea Change

On an Even Keel: Seaweed Fibre Kelsun Starts Much-Awaited Retail Run

NextGen materials innovator Keel Labs has announced the commercial launch of garments made with its seaweed-based Kelsun fibre as a range being released later today by California brand Outerknown. Co-Founder Tessa Callaghan tells texfash what it took to get Kelsun from the concept stage to its commercial arrival.

Long Story, Cut Short
  • Kelsun sheds neither harmful microplastics nor dangerous chemicals polluting our planet and our bodies.
  • Kelsun is both a USDA certified 100% biobased based product, as well as 100% biodegradable.
  • There are a couple of other companies creating fibres from seaweed, but “what sets Kelsun apart is that it is the only fibre on the market that can be labelled an ‘alginate’ fibre.”
The Kelsun fibre was created to supply the textile industry with a more sustainable alternative to conventional materials.
An Alternative The Kelsun fibre was created to supply the textiles industry with a more sustainable alternative to conventional materials. Keel Labs

Keel Labs is a NextGen materials company based in North Carolina, US. Its Kelsun fibre, made from seaweed, has been in the pipeline for a while. The company has collaborated with well-known designer Stella McCartney, with the products being showcased at the recent Summer 2024 runway show.

But now, Keel Labs Co-Founders Tessa Callaghan and Aleks Gosiewski are ready for the commercial release of the much-awaited Kelsun fibre in the form of a range of garments being launched by apparel brand Outerknown.

CEO Callaghan and COO Gosiewski, who crossed paths as design students, created Kelsun as a plug-and-play replacement for conventional fibres used in the textiles industry. Harnessing the renewable power of the ocean’s resources, Kelsun is made with an abundant biopolymer found in seaweed, resulting in a fibre that is 100% bio-based and biodegradable in wastewater. Seaweed is one of the most regenerative organisms on the planet; it absorbs carbon dioxide in the ocean, similar to trees on land.

texfash.com: It's been a while since we had first heard of Keel Labs and Kelsun, but it's only now that we finally see Kelsun for real. Please tell us what happened in the interregnum. From concept to trials to the real product -- how did things play out?
Tessa Callaghan: We are very proud of the progress we have made since the inception of Keel Labs, now integrating Kelsun into commercial mills and releasing the first retail product with Outerknown. Kelsun is a truly novel fibre, introducing a new material to compete with industries in place for centuries is a serious endeavour, and not an easy one at that. From developing our technology, to testing at a variety of scales with brands, to integrating throughout a global supply chain, there has been a great deal of work that has gone into getting to this point. 

Something of this sort will obviously come with its own set of unique challenges. Please tell us what it was like. And importantly, how did you surmount them?
Tessa Callaghan: In the early days, our biggest hurdle was overcoming the technical challenges of creating a fibre that performed to the strength, durability, and hand-feels required by apparel and functional textile products. We have overcome those technical challenges at the design level through a great deal of development work, testing iteration, and above all bringing on strong team members with expertise in each area of the fibre’s production. 

But then, let's go back to the beginning of it all. How did you two get together? Was it a meeting of ideas? And what were the initial ideas like? Then again, it often happens that one starts with one set of ideas, and what turns out in the end may well be very different. Was it so with you, or is the final product exactly as you had envisaged when you started?
Tessa Callaghan: We met as design students seeking a way to tackle the issue of waste and pollution in the fashion industry. Having an in-depth experience of both product and supply chain functionality, it was clear an impactful solution would have to start at the foundational level, fibres.

By creating a diverse set of parameters we knew had to either stay—like accessibility, manufacturing systems, and functionality—along with those that had to change like land and chemical use. Therefore, what we needed to find was a resource that was rapidly renewable and abundant. After a great deal of research and trial and error, we found that seaweeds hit on all our criteria, and have since then become the building block of our work at Keel Labs.

How did you start? Where did the seed money come from? How much did you invest? How much do you need to scale up to break even? Do you have a deadline/timeline for that?
Tessa Callaghan: Keel Labs is a venture-backed company, completing our Series A fundraising in 2022. To date we have raised around $17.9 million. 

Using seaweed for fabrics. That's been known for quite some time. What, according to you, is the reason why textiles made with/from seaweed had never been that popular all this while? Was it the cost of production? Was it the cost of extraction? Or, was it something else?
Tessa Callaghan: There are a couple of other companies creating fibres from seaweed, but what sets Kelsun apart is that it is the only fibre on the market that can be labelled an ‘alginate’ fibre. The others are typically MMCFs with a small portion of seaweed added, both reducing their novelty and impact potential.

The primary reason we see that this has not been previously integrated within the textiles industry at large is because, over centuries of cultivation and development, land-based agriculture has simply become engrained in “how we do things.” It is only recently that we’ve, as a global populace, recognised the need to diversify our resources in the face of a climate crisis. 

Biomaterials, biofabrics, biotextiles: these are keywords much in vogue today. Yet, there are still only a handful of companies that use seaweed. What is holding back seaweed? Is it R&D? Is it mass acceptance?
Tessa Callaghan: Traditionally seaweed has been used for direct consumption or as an additive in food and medicine, and is a mature, developed industry. Now, there are quite a few companies that are utilising seaweed for alternative use cases.

Over the past 10 years, we have seen a rise of companies creating innovative products in packaging, paper, dyes, foams, and for us, textiles. This comes off the back of businesses realising there is a dramatic need for more holistically sustainable solutions, and development and adoption cycles take time. It is less about being held back and more about combining resources to enable faster adoption.

Tessa Callaghan
Tessa Callaghan
Co-Founder and CEO
Keel Labs

Over the past 10 years, we have seen a rise of companies creating innovative products in packaging, paper, dyes, foams, and for us, textiles. This comes off the back of businesses realising there is a dramatic need for more holistically sustainable solutions, and development and adoption cycles take time. It is less about being held back and more about combining resources to enable faster adoption.

 In the first commercial launch for the Kelsun fibre, Keel Labs is releasing the first limited-edition run of seaweed-based fibre apparel with California-based brand Outerknown. The Outerknown Blanket Shirt will now be available made from the Kelsun seaweed-based fibre.
It's Out In the first commercial launch for the Kelsun fibre, Keel Labs is releasing the first limited-edition run of seaweed-based fibre apparel with California-based brand Outerknown. The Outerknown Blanket Shirt will now be available made from the Kelsun seaweed-based fibre. Outerknown - Keel Labs

Says on your website: “…flagship product, Kelsun, a fibre made from a biopolymer of seaweed…” – how earth friendly is the entire process, from harvesting to the final product on the shelf? Are there, what one would call, any grey areas? 
Tessa Callaghan: When compared with the entirety of the available fibres market today, because Kelsun is sourced from organisms grown in the ocean (seaweeds), we are able to eliminate soil degradation, and pesticide and fertiliser usage, while removing the need for mass amounts of fresh water required to grow plants on land.

Additionally, because we aren’t relying on petrochemicals or toxic substances throughout our production process, Kelsun sheds neither harmful microplastics nor dangerous chemicals polluting our planet and our bodies. On top of these, Kelsun is both a USDA certified 100% biobased based product, as well as 100% biodegradable. With all of that combined, Kelsun addresses the wide range of negative impacts associated across the raw material landscape. 

Imagine promoting seaweed cultivation as a substitute for cotton. Can we expect seaweed fields in the future? How viable, feasible would it be? Does that make sense?
Tessa Callaghan: Seaweed grows in the ocean, and there are systems that have been in place for hundreds of years to grow and harvest it. There are already seaweed fields, both naturally occurring and cultivated. For our purpose, there are more than enough resources available to meaningfully scale Kelsun while being mindful of our planetary boundaries. 

Which brands are your clients? What has been the feedback like? What are the changes that they have demanded since you started, if at all?
Tessa Callaghan: To date, we have worked with Stella McCartney in her Spring ‘24 runway show, and now Outerknown on this release. We have also collaborated with designer Mr. Bailey, and design firm Interesting Times Gang on a couple of special projects showcasing Kelsun’s textile capabilities. We have many projects in the pipeline that we are eagerly anticipating sharing more broadly, so stay tuned in the upcoming months for more!

We met as design students seeking a way to tackle the issue of waste and pollution in the fashion industry. Having an in-depth experience of both product and supply chain functionality, it was clear an impactful solution would have to start at the foundational level, fibres.

Subir Ghosh

SUBIR GHOSH is a Kolkata-based independent journalist-writer-researcher who writes about environment, corruption, crony capitalism, conflict, wildlife, and cinema. He is the author of two books, and has co-authored two more with others. He writes, edits, reports and designs. He is also a professionally trained and qualified photographer.

 
 
 
  • Dated posted: 24 September 2024
  • Last modified: 24 September 2024