101: Bio-Leather Alternatives
For a long time, the market was relatively easy to understand: natural leather on one side, synthetic leather alternatives on the other. If you didn't want to use animal leather, you could choose materials based primarily on PU or PVC.
But that landscape is changing.
A new generation of materials is emerging from plants, fungi, bacteria, algae and biotechnology. They are often grouped together under terms such as bio-leather alternatives or bio-alternatives.
The third material category
These are materials derived partially or predominantly from biological feedstocks — including plants, fungi, bacteria, algae or cultured biomolecules — and developed to replicate some of the functional and aesthetic properties traditionally associated with animal leather.
But even within this third category, the differences are enormous.
One material may be made from agricultural residues and processed using technologies that are already familiar to the textile industry, while another may be grown from fungal biomass or produced through microbial fermentation.
Calling all of these “bio-alternatives” gives us a convenient category, but it doesn't necessarily help us understand the materials.
This article is to bring a bit of clarity as to who is who in the bio-leather alternatives universe.
1. Plant-based alternatives
Plant-based materials are currently among the most commercially developed bio-based alternatives.
Their feedstocks can include agricultural residues and plant fibres, including materials derived from non-food-grade crops or food industry by-products. Depending on the technology, examples can include wheat, banana fibres, hemp and other plant-based feedstocks.
The best examples of plant-based materials are:
LOVR™ by Revoltech
MIRUM® by NWF
Nutico by Bio2Materials
All can be found and sourced on our platform.
The technology generally involves processing these fibres or residues and combining them with binders and bio-based coating systems. The resulting material is often manufactured as a composite sheet and supplied in rolls.
Some constructions can be relatively close to a mono-material approach (LOVR®), while others use a textile backing (Elevate™). Backings can include woven or jersey constructions, including materials such as Tencel or cotton.
This distinction matters.
Two materials can both be described as plant-based but behave completely differently depending on what is used to bind, coat or reinforce the plant-derived component.
From a market perspective, plant-based materials currently have one of the strongest positions within the bio-material landscape in terms of technology scale and price-point competitiveness (read about price ranges for bio-leather alternatives here).
They are relatively widely available, and their manufacturing can be compatible with existing textile and coating infrastructure. This gives them significant scalability potential compared with some of the newer technologies.
They are also increasingly supported by life-cycle assessments and certification systems relating to bio-content, provenance and other material characteristics.
2. Fungal materials
Fungi offer a completely different approach.
Here, the raw material can come from fungal caps or mycelium grown on agricultural waste substrates.
Examples of fungal materials include:
MUSKIN® by Grado Zero Lab
Myccera® by Save Earth Inc
MYCEL® by MYCEL
Ephea® by Ephea Bio
Rather than simply processing an existing plant fibre, the material itself can be generated through controlled fungal growth, creating a fibrous biomass that can subsequently be compressed, stabilised, coated and finished.
Depending on the technology, fungal materials may be available as mycelium-based sheets, mushroom-cap cuts or materials supported by natural textile backings.
Some processes use chromium-free stabilisation or tanning approaches.
The appeal of fungal materials is partly their ability to introduce a genuinely different manufacturing paradigm into the materials industry.
But the challenge is scalability.
Compared with conventional textile and coating infrastructure, fungal materials currently require more proprietary production systems, and commercial availability remains relatively limited.
So while the technology is already moving into commercial applications, the supply landscape is still considerably smaller than that of more established plant-based alternatives. And prices are rather high compared with their plant-based peers.
Mycerra by Save the Earth Ltd is available on our platform.
Discover Substanz’s Fungal materials projects
3. Bacterial materials
Bacterial materials take the concept of biological production another step further.
Here, bacteria are fed with sugars, agricultural residues or fermentation nutrients, which can include streams such as coconut water or fruit residues.
Through microbial fermentation, the bacteria produce a nanocellulose fibre network. That network can then be harvested, compressed, dried and surface-treated to create a sheet-like material. Some technologies can produce a relatively pure bacterial sheet, while others combine it with natural textile backings.
For softer constructions, natural waxes and oils can be used to introduce flexibility and stretch.
The fascinating part is that the “factory” is biological.
But this also creates some of the current challenges.
Bacterial materials are still largely in the advanced R&D to early commercial stage, and scaling fermentation is only one part of the equation. Drying speed, for example, can become an important manufacturing bottleneck.
The potential is significant, but the infrastructure required to move from laboratory-scale production to consistent industrial volumes remains a major factor.
The price point depends on material production scale and can be comparable to plant-based peers. However, it can also go rather high depending on the producer.
Bacterial materials include:
Discover Substanz’s Bacterial materials projects
4. Algal biomaterials
Algae is another rapidly developing area, but the category is particularly broad.
Potential feedstocks include algae biomass, alginate, seaweed-derived polymers and microalgae oils or pigments.
Different technologies can use these inputs in biomass blends, biopolymer films, foams, coatings or composite sheets.
Some constructions incorporate an internal mesh or other reinforcement to provide structural stability.
Compared with plant-based and some fungal technologies, however, algal biomaterials are generally at a much earlier stage of commercial development.
Many are still being developed at pilot or experimental scale, and some applications currently focus more on coatings, surface treatments or decorative elements than on complete leather-like sheets.
The long-term potential is interesting — particularly given the abundance and diversity of algal feedstocks — but consistency and material performance are still being developed.
This is a good example of why we should be careful when comparing materials simply by their biological origin.
“Algae-based” tells us where the story begins. It doesn't tell us what the final material is.
In this group we have:
MATTR® by Revoltech
AlgaeSkin by PeelSphere
Discover Substanz’s Algal materials projects
5. Lab-grown collagen and cultivated leather
And then we reach perhaps the most technologically ambitious category: cultured or lab-grown leather.
Here, the starting point is not necessarily a plant or a naturally occurring sheet-forming organism.
The raw materials can include engineered cells, yeast or bacterial fermentation systems, growth media and recombinant collagen proteins.
Using precision fermentation or tissue-engineering approaches, collagen can be produced and assembled into structures intended to replicate characteristics of animal leather.
Conceptually, this is very different from producing a plant-fibre composite.
Rather than taking a plant or fungal biomass and turning it into a leather-like sheet, the objective is to produce the biological building blocks themselves.
The technology, however, remains at an early-stage or pre-commercial level. Cost, biomanufacturing infrastructure and the complexity of producing materials at meaningful scale remain significant challenges. Commercial availability is therefore extremely limited compared with more established alternatives.
But perhaps the most interesting thing about this category is where it could eventually take the conversation. If biotechnology allows us to produce collagen-based material without the animal, are we still talking about a “leather alternative”?
Or are we eventually talking about a new form of leather produced through a completely different manufacturing system?
That distinction may become increasingly relevant.
Read about companies developing lab grown leather here.
One category. Very different technologies.
Looking across these five groups, something becomes clear.
Plant, fungal, bacterial, algal and cultivated materials should not be treated as variations of the same technology.
They represent fundamentally different approaches to material production.
Their feedstocks are different.
Their manufacturing processes are different.
Their infrastructure requirements are different.
Their development stages are different.
And their potential applications can be different.
This matters enormously for brands and designers.
A material that works beautifully as a soft fashion accessory may not work for a structured bag.
A material that can be supplied in rolls at relatively large volumes may have completely different commercial implications from a material still being produced at pilot scale.
And a material with a high percentage of biological feedstock may still require coatings, binders or backings that significantly influence its final properties.
So the question should never be simply:
“Is this bio-alternative?”
It should be:
“What is it made from? How was it made? What is its construction? How does it perform? And can it actually work for my product?”
And perhaps the future of material innovation lies precisely in moving beyond the category — and becoming much more precise about what each material actually is.
Substanz offers consulting and sourcing services for brands willing to include new-generation and low-impact materials in their lines. This includes bio-leather alternatives. Please discover our Consultancy offer here.
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