Picture what happens to your hair after it hits the salon floor. A broom, a dustpan, a black bin liner. That’s essentially been the story for as long as salons have existed. The clippings from a bob, the sweepings from a buzz cut, the leftover layers from a blowout – all of it headed straight to landfill, without a second thought from almost anyone involved.
Except, it turns out, hair is genuinely remarkable stuff. And a small company in the French city of Clermont-Ferrand has been quietly proving it, by taking those forgotten strands and sending them into forests to protect young trees. The method works. The science behind it makes sense. And the scale of what’s being diverted from the bin is significant enough to stop you mid-thought the next time you sit down in a salon chair.
This isn’t a feel-good story about symbolic gestures. It’s about a material most of us have never really considered, being put to work in ways that solve two very different environmental problems at once.
The Problem Nobody Was Thinking About
According to a 2026 France 24 report, in France alone, nearly 4,000 tonnes of hair end up landfilled or incinerated every year. That number is for one country. Salons in the U.S. and Canada toss out some 31.5 tons of hair per day, and that figure is sevenfold higher in Europe. Globally, about 810,000 tons of human hair waste is generated worldwide each year, according to a 2026 report from TriplePundit citing new research from Yildiz Technical University in Istanbul.
The problem with sending all of that to landfill isn’t just the volume. Since hair is predominantly keratin, it breaks down slowly, can overcrowd landfills, and is often burned for disposal, which releases greenhouse gases. That slow decomposition rate – a consequence of hair’s complex protein structure – contributes to landfill overcrowding and ultimately the depletion of valuable land resources.
The irony is that the same quality making hair a landfill headache – its stubborn durability – is exactly what makes it useful elsewhere.
What Capillum Actually Does
In 2019, Clément Baldellou and James Taylor created Capillum, the first hair recycling network. The company is based in Clermont-Ferrand and built on a straightforward premise: hair salons are generating a consistent, abundant raw material every single day, and nobody is doing anything with it. The founders found that hair, as a capillary fiber, could replace many plastic fibers. They spent two years studying what could be done with it, meeting with manufacturers, and ultimately choosing two areas of recovery: mulching and absorption products that capture hydrocarbons.
Hair is currently collected directly from over 4,200 Capillum partner salons, and some products are already on the market, including mulching products for agriculture. After winning over more than 6,000 salons in France, Capillum has now expanded internationally, announcing its development into Belgium and Luxembourg.
The process itself is less complicated than you might imagine. The company accepts hair regardless of texture, length, color, or whether it has been dyed. Once gathered, the hair is fed into a machine that minces everything together into dense fiber sheets that can be laid around the base of trees. The result is a flat, mat-like product that wraps around young saplings at soil level – unassuming to look at, but doing something quite specific once it’s in place.
Why Deer Are the Enemy of Young Forests
To understand why these hair mats matter, you have to understand what deer actually do to young trees, which is considerably more destructive than most people realize.
Male deer cause significant damage to young trees by rubbing their antlers on trunks between September and November. As Davey Tree explains, by fall the antlers are fully grown but the velvet coat starts to itch, so deer look to trees to smooth out their new crown – scraping off the velvet cover while also marking territory during breeding season.
The biological consequence of that battering is severe. When deer rub their antlers on trees, they strip away the tree’s cambium – the layer between the inner bark and the outer wood that helps nutrients move throughout the tree. If the cambium is stripped off all the way around the trunk, the damage is done, and there’s a good chance the tree won’t survive many more winters. The trees most likely to be damaged are young ones with smooth bark, in the one-to-four-inch trunk diameter range – species like maples, birches, and magnolias. In other words, exactly the kind of saplings that reforestation projects depend on surviving long enough to matter.
Deer overpopulation is a major concern in many countries, associated with suppressed tree regeneration and increased damage to forest ecosystems. Deer browsing increases the mortality of tree saplings, preventing the successful establishment of new generations, with negative implications for the regeneration of forest ecosystems.
The conventional fix has been plastic tree guards – rigid tubes fitted around each sapling. They work, up to a point. But they’re made from petroleum-based materials, they don’t decompose, they need to be removed and disposed of separately, and the cost of doing that at scale across thousands of planted trees is significant. A biodegradable alternative that also actively improves the soil it sits on is, from a forestry perspective, a genuinely different proposition.
The Science of Why Hair Repels Deer
The scent of human hair naturally discourages deer from getting too close to the trees, steering them toward other vegetation instead. This isn’t a theory that emerged in a lab – gardeners have been using hair to deter animals for generations, and studies show human hair can help repel pests like rodents, deer, and wild boars. The working explanation is that the smell of human presence registers as a threat. Deer are prey animals with acute senses of smell; the persistent scent of humans around a tree is enough to make the animal choose something less alarming.
What sets Capillum’s approach apart from someone stuffing loose clippings into a mesh bag is the industrial consistency of the product. The company deliberately avoids a speckled or inconsistent carpet of fibers, because the industrial process allows a standardized, reproducible product with the same level of quality every time. That consistency was crucial for professional buyers, who needed reliable performance at a consistent price.
And then there’s what happens after the deer deterrent phase is over. Unlike plastic guards, the hair fibers gradually decompose and return nutrients to the soil. As the keratin breaks down, it releases nitrogen and amino acids that can support plant growth. That slow-release quality is actually an advantage. According to National Geographic, hair contains a lot of protein with a relatively high nitrogen content – each strand is made of roughly 16 percent of this essential nutrient. By contrast, a pile of cow manure typically has between 0.6 to three percent nitrogen. Hair also releases nutrients more slowly than the equivalent amount of commercial fertilizer, which matters because it prevents excess nitrogen from leaching into waterways. The mat that begins as a deer deterrent ends as a slow fertilizer. The plastic tube just ends as plastic.
The Bigger Picture for Hair Recycling
Capillum isn’t the only company working this out. Across Europe and further afield, the logic of salon hair as a resource is gaining traction. UK-based Green Salon Collective has diverted over 225 tons of waste from landfill since opening in 2020, avoiding 14.2 tons of carbon dioxide emissions in 2025 alone. The company recycles hair, hairdressing foil, aerosol cans, towels, and color tubes from salons across the United Kingdom and the United States.
Barcelona startup Clic Recycle upcycles hair into a variety of products, including biodegradable mulch made from a mixture of hair, industrial hemp, and natural vegetable fiber, used on farms, vineyards, parks, and around rivers. It provides benefits including decreasing soil erosion, weeds, and herbicide use, and lowers irrigation needs by 40 percent or more while breaking down in three to five years.
Capillum has also extended its own reach beyond the forest. The company’s Capiclean pellets, made from hair, can absorb up to 26 times their weight in hydrocarbons – meaning the same material that guards a sapling in a French forest can also be deployed to clean up an oil spill. Hair is able to absorb up to eight times its own weight in hydrocarbons, being both hydrophobic (repelling water) and oleophilic (attracting oil).
The challenge facing all of these companies is less about the technology and more about the incumbent. Turning the tide against plastic use is very complicated because plastic is already accepted, it’s everywhere, and it’s cheap. A material that has been the default for decades doesn’t get displaced by a better idea alone – it needs logistics, cost structures, and habit change to line up at the same time.
What This Actually Means
There’s something worth sitting with here, beyond the ingenuity of the idea itself. The problem with most sustainability stories is that they ask for sacrifice: use less, buy less, choose the more expensive option because it’s better for the planet. This one doesn’t do that. The hair that Capillum collects is waste that was already being thrown away. The salons don’t change what they do. The customers don’t change what they buy. The clippings that would have gone into a bin liner instead go into a collection bag. A sapling that would have needed a plastic tube gets a hair mat instead, and the forest it’s part of has a better chance of growing into the canopy it’s meant to become.
There’s also something almost circular about it in a very literal sense. The nutrients that a living person absorbed through food, that were deposited into hair follicles, that grew into strands over months and years, end up, after a haircut and an industrial mincing process, feeding the roots of a tree. It doesn’t resolve any grand environmental crisis on its own. But it does make you look at the floor of a hair salon rather differently.
AI Disclaimer: This article was created with the assistance of AI tools and reviewed by a human editor.