Most people who care about what goes on their skin know what "fragrance" means on a cosmetics label. It is a legal catch-all that can cover several thousand undisclosed chemicals. They look for parabens, synthetic dyes, and now PFAS in SPF. They read the INCI list before they buy a moisturiser.
The same people, in many cases, have no idea what is in their clothes.
A t-shirt is against your skin for eight or ten hours. It absorbs your sweat and is warmed by your body. The fibres and any chemical finishes applied to them are in more or less constant contact with your largest organ, yet the scrutiny we now apply to skincare rarely extends to the clothes we wear under it. This is starting to change.
Clean fashion is not a new certification or a marketing label. It is the same logic applied to clothing: what is actually in this, and is it something I want next to my skin all day.
"What it wears all day matters as much as what you put on it at night."
What is actually in your clothes
A garment is not just its fibre. Before it reaches a shop, fabric typically passes through dyeing, bleaching, softening treatments, wrinkle-resistance finishing, and in many cases a water-repellent coating. Each of those steps uses chemistry. Some of it washes out after a few cycles. Some of it does not wash out at all.
The substances that come up most often in testing of conventional garments:
- Azo dyes, which can break down into carcinogenic aromatic amines on contact with skin
- Formaldehyde in crease-resistant and "easy-care" finishes
- PFAS in water-repellent coatings, sometimes called "forever chemicals" because they do not break down
- Phthalates in some PVC prints and rubber coatings
- Optical brighteners, which stay active on fabric in sunlight
- Nickel and chromium traces in metal hardware and certain dye processes
- Dyes independently tested for skin safety and restricted substance lists
- No formaldehyde finishes. The fabric may wrinkle. That is acceptable.
- No PFAS coatings. Water resistance through fabric construction, not chemistry.
- Oxygen bleaching instead of chlorine, or no bleaching at all
- No heavy metal mordants in the dye process
- OEKO-TEX or GOTS certification as a third-party check on all of the above
To be clear: most people wearing conventional fast fashion are not experiencing acute harm. The concern is not a dramatic reaction but years of low-level exposure, particularly for anyone with sensitive skin, eczema, or children, whose skin barrier is thinner. The clean beauty argument was identical, and it shifted an entire industry.
A short guide to fabric and what it means for your skin
Not all natural fibres are automatically clean, and not all man-made ones are automatically problematic. The fibre is only part of the picture; how it is processed matters as much.
Tencel™
How to read a garment label
EU law requires fibre composition on every garment sold here. What it does not require is any disclosure of the dyes, coatings, or finishing treatments applied to that fibre before it was cut and sewn. This is the gap that existed in cosmetics before the EU Cosmetics Regulation forced full ingredient labelling. Fashion has not yet reached that point.
The most reliable shortcut while we wait is independent certification.
OEKO-TEX Standard 100 tests the finished garment against a list of more than 100 regulated substances, including formaldehyde, azo dyes, pesticide residues, and heavy metals. A garment with this label has been tested at an accredited laboratory and confirmed safe for skin contact. It is the closest equivalent in clothing to the "tested, no nasties" standard that clean beauty brands apply to cosmetics.
GOTS (Global Organic Textile Standard) covers the entire supply chain from organic fibre sourcing through dyeing, finishing, and manufacturing, including labour conditions. It is the more comprehensive standard and harder to achieve, but it tells you something about the whole production process, not just the end product.
"Certification is not a premium. It is the baseline proof that what you are wearing has actually been checked."
Is clean fashion the same as sustainable fashion?
Not exactly, and the difference is worth understanding.
Sustainable fashion is mostly an environmental argument: lower carbon, less water, better end-of-life for the garment. Those things matter. Clean fashion starts from a different question, which is what this garment does to the person wearing it. The two overlap considerably, because certified organic fibres and cleaner production processes tend to be better for the environment as well as for skin. But they are not the same conversation.
Someone who has never engaged with sustainability as a concept may find the clean fashion framing more immediately relevant. Most people care about what goes on their skin. Not everyone has an opinion about carbon footprints. Starting with the human body, not the planet, opens the conversation to a much wider group of people. In that sense, clean fashion is less a subcategory of sustainable fashion and more a separate entry point to similar conclusions.
What we carry at Noumenon
We stock brands we would describe as clean in the sense used throughout this piece: transparent about what their fabrics are made of and how they are processed, working with certified fibres and finishes, and making clothes that are designed to be worn close to the body without compromise on what that means.
Sisterhood focuses on underwear and base layers using OEKO-TEX certified materials. It is a category that almost no one thinks about critically, despite being the layer most consistently in contact with skin. Cossac works in certified natural fibres and is precise about the finishing process. Veja publishes its supply chain in unusual detail, including tanneries and environmental impact per model. By Signe designs in natural materials and does not use synthetic finishes.
None of these brands market themselves as "clean fashion." They make clothes the way a clean beauty brand makes skincare: starting from what this will touch, and working backward.
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