Vietopia
Vietopia sells clothing that we checked fibre by fibre for natural, non toxic materials. See its verified sustainability rating and review to help you buy natural, non toxic clothing.
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By the numbers
18 sources on file
Tap any fibre to see its class and whether it is in Outer Known. The same engine that scores every brand.
🔍 Outer Known is 1 of 1,000+ brands we scan fibre by fibre. See Outer Known’s full 831-style breakdown
Every sku, scored
Tick what your skin reacts to. We check it against the verified composition, live
Who’s behind it
Sourcing
Getting It
Outer Known is not GOTS certified as a company, but uses GOTS certified organic cotton.
Outer Known is not a B Corp. The brand-level labels are thinner than the product-level ones.
Flagged in the sourcing ledger before you buy.
What the label won’t tell you
Outer Known is Contains PFAS. 493 of 831 styles scanned: zero PFAS, zero formaldehyde, dye process on record: Low-impact / GOTS-certified dyes
“Eco” and “green” have no legal meaning, and thousands of unverified claims flood the market. We scanned 831 styles from the store’s own product feed and publish a score only at full coverage. We read certificates, not adjectives.
And nothing is hidden: 84 products wouldn’t scan cleanly. Every one is named in the sourcing ledger below.
Most “cotton” underwear hides elastane or spandex in the trims. We read the stated fibres on 493 of 831 styles, thread by thread: 78% plant, 21% synthetic.
Latex and rubber waistbands are a top trigger for contact eczema. Elastic check across the catalogue: Elastane. Spandex, flagged red in the Skin-Safe section above.
Traceability on record: Fibre-to-garment; factory: Production across Peru, China, Mexico, Sri Lanka, Malaysia, Portugal, Vietnam and USA. We publish the full sourcing chain and the honest red flags, including where sources conflict.
Synthetic underwear sheds plastic fibres onto your skin and into the water with every single wash. Outer Known is 21% synthetic, so yes. These styles shed. Wash cool, use a guppy bag, and favour the plant-fibre options in the range.
Sources: consumer research on formaldehyde in easy-care fabrics (~9% of people react), PFAS in water- and stain-resistant finishes, and hypoallergenic underwear for eczema and contact dermatitis.
Confirmed at the source
plant fibre across all 831 styles, read style by style from the live product feed. No sampling, no marketing page.
100% organic cotton (GOTS-approved via Ber… Organic cotton certified GOTS from field to finished garment.
Fair Labor Association (FLA) accredited co… Carries Fairtrade / GOTS-level certification with traceability on record.
Low-impact / GOTS-certified dyes Chemical flags and dye chemistry are recorded for every brand we scan.
On record. Packaging claims not documented. See the full record.
Every certifier this brand claims, with a direct link to the proof where it exists, or flagged where it is only the brand’s word.
Compare
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Real figures from the Throne Standard scan: Outer Known 78.7% plant / 831 styles · Pact 62% / 217 · MATE the Label 58.9% / 106 · Patagonia 29.2% / 0 · Gymshark 26.5% / 1793 · Harvest & Mill 97% / 135 · Terra Thread 100% / 44 · Everlane 69.7% / 733 · Kotn 87.6% / 1032 · Boody 0% / 156 · Kent 100% / 40.
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| Directory | Mark | What it measures | Checked |
|---|---|---|---|
| Good On You | Good | Published policy and supply-chain disclosure across planet, people and animals | 2026-04-27 |
| The Throne Scan | 3/5Part natural and Ethical | Outer Known has not been scanned yet. | 2026-07-30 |
Publishes its factory list; Supply chain traced and documented.
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The complete clothing data behind the score
Where the materials come from, who makes it, and how traceable it is.
Outer Known publicly maps 100% of its supply chain and publishes its Tier 1 factories with supplier stories, also sharing partners through the Open Apparel Registry. For its organic cotton tees, Outer Known traces fibre from Bergman Rivera’s GOTS organic cotton fields in Peru through to sewing at family-owned Serflex in Lima, and its final production stage is FLA-accredited with Bluesign and Fair Trade partners. This makes Outer Known one of the most transparent brands in the batch, alongside Where Does It Come From?.
How it was read: Every product listed in Outer Known's live catalogue is retrieved and its stated fibre composition read individually, from the Outer Known product page, Outer Known's own product data and its material labels. A fibre percentage for Outer Known is published only when 100% of the Outer Known catalogue has been read. Items Outer Known sells that carry no clothing textile, such as gift cards, packaging, jewellery and homeware, are excluded from the percentage rather than counted as a pass or a fail.
Why excluded: These are the items Outer Known sells that carry no clothing textile to rate: gift cards, packaging and returns kits, jewellery, homeware, toys, body care and checkout line items. Outer Known's fibre percentage leaves them out rather than counting them as a pass or a fail.
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What it costs per wear, who actually makes it, and how much the fabric sheds.
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