Functional fiber technology for prolonged scalp contact.
Nourie™ is a fiber system that replaces commodity synthetics with bio-derived polymers engineered to support scalp health during weeks of continuous wear. Designed and clinically tested by Aja Labs.
The material problem
Synthetic braiding hair sits against the scalp for weeks at a time. Most of it is made from PVC-based modacrylic fiber, a material never designed for prolonged dermal contact. Under real-world wear conditions (heat, sweat, friction, UV exposure), PVC surfaces release plasticizers and chloride compounds that degrade the scalp barrier over time.
The industry response has been to normalize the irritation. Consumers are told to soak hair in apple cider vinegar before installation. ACV (acetic acid, roughly pH 2.5 to 3.5) partially strips alkaline surface coatings and plasticizer residue, which reduces immediate irritation on contact. But it does not change the base polymer. The fiber is still PVC. The contact chemistry over weeks of wear is unchanged. A rinse is not a redesign.
In February 2025 and again in February 2026, Consumer Reports tested synthetic braiding hair products and found 39 of 40 synthetic samples positive for harmful substances. Human braiding hair was the single most contaminated product category tested.
Nourie™ starts from a different premise: the contact window that has been transferring contaminants can instead deliver chosen ingredients.
Built to deliver, not to leach
The braiding hair on the market today is a contradiction. Wearers reach for it to protect their hair and care for their scalp. The material itself does the opposite. It irritates. It leaches. It is engineered for cost, not for the body. Nourie™ is engineered for the body. Every strand is built to do two things at once: behave like hair, and deliver active ingredients to the scalp underneath it. The nourishment is not coated onto the fiber. It is part of how the fiber was designed.
Nourie™ responds to real-world wear conditions. When the scalp environment shifts, whether heat, pH, friction, or dryness, the fiber’s surface adapts. It releases humectants, barrier-supporting compounds, and microbiome-aligned actives in response to need, not on a fixed schedule.
The fiber core approximates the physical properties of human hair (diameter, tensile strength, knotability, washability) while embedding biological function that human hair and commodity synthetics cannot provide.
| Property | Nourie™ | PVC / Modacrylic (industry standard) | Plant-based fiber (banana, etc.) |
|---|---|---|---|
| Base material | Bio-derived polymer, selected for biocompatibility | Polyvinyl chloride or modacrylic polymer | Processed cellulosic plant fiber |
| Manufacturing oversight | Made in the USA. Team on site. Key steps in FDA GMP-registered facilities. | Imported. | Imported. |
| Designed for skin contact | Yes. Originally developed for prolonged scalp contact. | No. Originally developed for plumbing and industrial textiles. | No. Originally developed for rope and woven textiles. |
| Active ingredient delivery | Controlled responsive release | None | None |
| Scalp barrier support | Actively supports barrier integrity | Degrades barrier over time | Neutral to mildly irritating |
| ACV soak required | Not required | Common practice (partial surface strip only) | Sometimes recommended |
| Clinical testing | Pre-trial hRIPT (58 participants, zero adverse events) plus Phase 1 efficacy trial measuring scalp biology under wear conditions: transepidermal water loss (TEWL), inflammatory biomarkers, and self-reported comfort, against a PVC comparator. | Typically none. Recent category entrants may conduct a basic hRIPT only — a short-duration patch test that does not measure wear-over-time chemistry or scalp biology. | Typically none. |
| Tensile and knot performance | Engineered to approximate human hair | Adequate | Often poor (brittle, breaks at knots) |
| Regulatory status | FDA GRAS-listed materials | No GRAS listing for dermal contact | Varies |
We are not just talking about scalp health. We are testing for it.
The synthetic braiding hair industry has operated for decades without meaningful clinical evidence. Nourie™ is the first fiber system in this category put through structured human trials for both safety and efficacy on the scalp. Two trials, back to back, designed to answer two separate questions.
“Clinically tested” is becoming a checkbox in this category. In practice, it most often means a single short-duration hRIPT: a patch test that establishes whether a material provokes an immediate skin reaction under occlusion. That is a floor, not a ceiling. It does not measure what happens to the polymer surface over weeks of wear, it does not quantify chemical migration as plasticizers and coatings break down under heat and sweat, and it does not measure scalp biology at all.
Nourie™ is tested at both levels. A pre-trial hRIPT to establish dermal safety, and a Phase 1 efficacy trial that instruments scalp biology under wear: transepidermal water loss as a barrier endpoint, inflammatory biomarkers as an immune endpoint, and self-reported comfort as the paired subjective signal. Different questions, different methods, all answered on the record.
Does prolonged contact with Nourie™ irritate the skin?
A Human Repeat Insult Patch Test is the standard clinical method for establishing whether a material is safe for prolonged dermal contact. Participants wore patches of Nourie™ fiber under occlusion across multiple induction and challenge cycles.
Result: Nourie™ cleared the dermal safety threshold that PVC-based fiber has never been formally required to pass.
Does Nourie™ actually support scalp health during wear?
Safety is the floor. Efficacy is the question. A Phase 1 trial measures whether the fiber produces a measurable scalp health impact under real wear conditions, using instrumented biology endpoints rather than self-report alone.
Preliminary result: statistically significant correlation between comfort and TEWL on Nourie™, with no corresponding correlation on the PVC comparator. Inflammatory biomarker data complements the barrier and subjective signals.
IRB-approved Phase 2 efficacy trial in development.
Details when ready.
Two trials. One for safety. One for scalp health impact. This is the evidence base behind every claim on this page, and the reason we can speak to brands, consumers, and investors in the same technical language.
For hair-care brands ready to extend their ingredient story onto the scalp
Shampoos, serums, braid gels, and braid sprays deliver ingredients to the scalp for seconds to minutes. Then they rinse, evaporate, or wear off. Braiding hair sits against the scalp for weeks. It is the longest-contact surface in the entire protective-style routine, and until now, no one has used it as a delivery system.
We are Matrixyl. You get to be the brand on the package.
Nourie is a platform technology, not a competing brand. We sit upstream of the consumer brands wearers already trust. You own the identity, the community, and the storytelling. We supply the fiber system that makes a new product line possible.
The model: take the active ingredients you have already built equity around, in your shampoos, conditioners, serums, gels, and sprays, and we embed them onto the surface of our fiber. Your ingredient story becomes a new SKU in your lineup. A braiding hair that delivers your formulation, continuously, for the full duration of the install. Your brand on the front. Nourie in the ingredients. Same trust, longer contact window, new revenue line.
What’s actually on your scalp.
Plain answers to the questions people usually have to dig for. No jargon. No lab-speak.
Why does braiding hair itch?
Most braiding hair is made from a plastic called PVC. Plastic was never meant to sit against your skin for weeks. Under heat and sweat, tiny chemicals from the plastic come off onto your scalp. Your scalp reacts. That is the itch.
It is not sensitive skin. It is the material.
Does soaking hair in apple cider vinegar actually help?
A little, and only at first. ACV rinses off some of the chemical residue on the surface. Day one feels better.
But the hair is still made of plastic. By week two, the same stuff is coming off onto your scalp again. A rinse does not change the material.
Wait, my hair is made of plastic?
Yes. Most synthetic braiding hair is modacrylic fiber, which is in the PVC family. Kanekalon is one common brand name. It was originally made for things like industrial textiles, not for hair that sits on your scalp for weeks.
Nobody told us. That is part of the problem we are fixing.
Isn’t everyone saying their hair is “clinically tested” now?
The phrase is getting used a lot, and it does not always mean much. Usually it means one quick skin patch test. That is the bare minimum. It does not tell you what happens after two weeks of wear. It does not tell you what the material is doing to your scalp underneath.
We ran two trials. One to check that Nourie™ is safe against skin. One to actually measure what happens on your scalp while you wear it: moisture, inflammation, comfort. Not just a patch. Real wear.
So how is Nourie™ different?
Nourie™ is not plastic. It is a new fiber made from plant-based materials, designed from the start to sit on your scalp.
Instead of leaking chemicals into your scalp, it does the opposite: it releases good things back (moisture and ingredients that protect your scalp) when your scalp needs them.
In our trials, people who wore Nourie™ felt more comfortable, and their scalps actually measured healthier than people wearing regular PVC hair.
What about banana hair and other plant-based options?
They skip the plastic, which is good. But raw plant fibers tend to be brittle. They snap at the knots, frizz in humidity, and do not hold up to washing.
Nourie™ is built to do both: be safe for your scalp and actually behave like hair you can braid, wash, and live in for weeks.
Platform, not brand
Aja Labs is a functional fiber laboratory and B2B manufacturing platform. We design, manufacture, and clinically test Nourie™, a fiber system for protective styling. Our commercial model supplies fiber technology to brands and professionals rather than competing with them at the consumer level.
For diligence materials or to discuss the company, contact us below.
- TRIAL 01Pre-trial hRIPT. IRB-approved. 58 participants. Zero adverse events.
- TRIAL 02Phase 1 efficacy trial for scalp health impact. Statistically significant correlation between comfort and TEWL biology on Nourie™, with no corresponding correlation on the PVC comparator.
- PATENTU.S. patent pending.
- MARKNourie™.
- PARTNERSHIPActive commercial partnership with a major fiber manufacturer. Details under NDA.
- PIPELINEBrand partnership pipeline and launch in development.
Contact
Partnership inquiries, diligence requests, and press. One channel.