Sustainable fashion is everywhere — but so is greenwashing.
More brands than ever call themselves "eco", "ethical" or "responsible". But how do you tell the difference between a brand that genuinely walks the talk — and one that's simply good at marketing?
The answer doesn't come from a logo. It comes from knowing what to look for.
Quick Checklist: Is This Brand Really Sustainable?
Before going deeper, here's a simple checklist you can use right now:
✔ Are materials named specifically — with origin and composition?
✔ Is production local or transparently communicated?
✔ Does the brand openly share its suppliers and partners?
✔ Are the products designed to last for years, not seasons?
✔ Does the brand avoid vague terms like "eco-friendly" without explanation?
✔ Are certifications independently verifiable — not just self-declared?
If most answers are yes, you're likely looking at a genuinely honest brand.
What Does Sustainable Fashion Actually Mean?
Sustainable fashion goes beyond materials. It's about the entire lifecycle of a product:
- how it's made
- where it's produced
- how long it lasts
- and what happens after use
A T-shirt made from organic cotton that gets thrown away after three months is not sustainable. A well-crafted product from innovative plant-based leather, used daily and lasting years — that is.
If you want to go deeper on the concept, our guide to sustainable fashion covers all the fundamentals.
10 Criteria to Spot a Truly Sustainable Brand
1. Materials: Plant-Based, Recycled, Durable
Everything starts with materials — but not every "vegan" material is automatically sustainable.
The key distinctions:
- PU and PVC — animal-free, but petroleum-based and often less durable
- Recycled materials — an interesting circular approach, but quality varies enormously
- Plant-based alternatives — from corn, grape, apple or cactus — renewable raw materials with a significantly better environmental footprint
Some brands work with materials like Viridis® (up to 69% plant-based raw materials from European corn and wheat) or Washpapa (a washable kraft paper from Germany) — materials that show where responsible fashion is heading.
If you want to understand which vegan materials are genuinely sustainable, our guide to vegan leather breaks down all the differences.
2. Production: Local and Transparent
Where a product is made matters just as much as what it's made from.
Shorter supply chains mean:
- lower CO₂ from transport and logistics
- better oversight of working conditions
- more transparency for the consumer
Brands that produce in Europe and openly name their workshops offer structural accountability that global mass production simply can't match — regardless of what the label says.
3. Certifications — Helpful, But Not the Full Picture
Certifications can guide you — but they're not the only measure of a brand's integrity.
Certifications worth looking for:
- PETA-Approved Vegan — confirms full exclusion of animal-derived materials
- OEKO-TEX Standard 100 — no harmful substances
- FSC® — sustainably managed forests
- GOTS — organic textiles
- Fair Wear Foundation — fair working conditions
The key distinction: certifications are independently verifiable. Terms like "eco-friendly" or "conscious" are not.
Real transparency matters more than logos.
4. Longevity: The Most Underrated Factor
🌱 Did you know? According to research by the Ellen MacArthur Foundation, the average number of times a garment is worn before it's discarded has fallen by nearly 40% over the past 15 years. Every time a product is replaced earlier than necessary, its environmental impact effectively doubles. (Source: Ellen MacArthur Foundation, "A New Textiles Economy", 2017)
A product is only truly sustainable if it's used for a long time.
What to look for when assessing durability:
- clean, strong stitching
- durable metal zippers
- robust lining materials
- structured construction that holds its shape
- timeless design that doesn't date
Fast fashion thrives on rapid turnover. Sustainable brands are built on permanence. The difference doesn't show at the point of purchase — it shows after three years.
5. Price vs. Value: Running the Right Calculation
Cheap is often more expensive in the long run — and the maths is straightforward.
A bag for €30 that's replaced after one year costs €2.50 per month of use. A bag for €150 that lasts five years also costs €2.50 per month of use. Same cost — but one ends up in landfill five times more often.
We explore this in more detail in our article Cheap Costs Twice.
6. Supply Chain Transparency
Honest brands have nothing to hide — and they show it.
Strong signals of genuine sustainability:
- production locations are named specifically
- material suppliers are openly communicated
- production processes are explained — not just polished
If this information is absent from a brand's website or communications, that's a clear red flag.
7. Packaging and Shipping
Sustainability doesn't end with the product. Packaging and shipping count too.
What to look for:
- plastic-free packaging materials
- recyclable or compostable alternatives
- shorter shipping distances through local production
Small details add up — especially at scale.
8. Care, Repair and Long-Term Use
A product you maintain lasts longer. A product that can be repaired doesn't need to be replaced.
Good brands:
- provide specific care instructions for their materials
- design products that can be repaired
- communicate honestly about how materials respond to everyday use
For practical guidance on how to clean and care for vegan materials like Viridis® and Washpapa without damaging them, our step-by-step care guide covers everything you need.
9. Functionality: The Overlooked Sustainability Criterion
A beautiful product you rarely use is never sustainable — regardless of the material.
The most sustainable product is the one used every day:
- versatile enough for different situations
- comfortable enough for daily wear
- functional enough to be genuinely needed
Design that ends up in a cupboard because it's too impractical gets replaced faster — which means more waste, not less.
10. Values and Long-Term Consistency
Sustainability isn't a marketing slogan. It shows up in decisions — made consistently over years.
What to look for:
- Does the brand talk about its limitations, not just its achievements?
- Is the communication consistent — even when it's uncomfortable?
- Are there concrete, verifiable examples behind every claim?
Brands that speak honestly about their trade-offs earn more trust than those that only project an ideal image.
Greenwashing: Common Tricks to Watch Out For
Many brands use sustainability as a marketing tool — without the substance to back it up.
Red flags:
❌ Vague terms without explanation — "eco-friendly", "green" or "conscious" with no concrete information behind them
❌ Missing production information — no mention of manufacturing country or partners
❌ Focus on a single "green" feature — "our packaging is recyclable" while the rest of the supply chain stays opaque
❌ Unverifiable certifications — logos without a link to the certifying body
❌ No long-term perspective — emphasis on trends rather than longevity
If something feels unclear, it's worth asking. Honest brands respond — and welcome specific questions.
How Plant Inside Applies These Criteria
Rather than talking about sustainability in the abstract, we try to apply it concretely — at every step.
Materials: Viridis® with up to 69% plant-based raw materials, Washpapa from Germany — both with independent certifications including OEKO-TEX, FSC®, USDA BioPreferred and PETA Approved Vegan.
Production: Handcrafted in small workshops in Poland — in Malbork, Elbląg and Nowy Sącz. Short supply chains, direct partnerships, fair wages.
Longevity: Some of our products have been used daily for over four years — and are still going. That's not a coincidence. It's the result of deliberate material choices and handcraft quality.
Transparency: We openly communicate where our materials come from, how they're certified and where our products are made.
More about our production philosophy in our article Why We Still Produce Our Bags in Europe.
If you'd like to see the products themselves, explore our vegan bag collection.
FAQ
How can I tell if a fashion brand is truly sustainable?
Look at four things: specifically named materials with disclosed origins, transparent production conditions, independently verifiable certifications, and products designed for long-term use. Vague terms without evidence are a warning sign.
Is vegan leather automatically sustainable?
No. PVC and cheap PU are animal-free but petroleum-based and often less durable. Plant-based alternatives like Viridis® have a significantly better environmental footprint. The type of material — not just the word "vegan" — is what matters.
What's the clearest sign of greenwashing?
Vague claims without concrete information or verifiable proof. If a brand writes "eco-friendly" but names no materials, no production location and no certifications — that's a red flag.
Are more expensive brands always more sustainable?
Not automatically — but higher-quality products often last longer, which reduces overall consumption. The relevant calculation is cost per use over time, not the purchase price alone.
Do certifications prove sustainability?
Certifications help — but real transparency matters more. A brand that openly discloses its supply chain earns more trust than one that simply displays logos.
How can I check whether certifications are genuine?
All credible certifications are publicly verifiable. PETA-Approved Vegan, for example, can be checked at petaapprovedvegan.peta.org. If a certification link is missing — it's worth asking.
Spotting Sustainable Fashion — A Question of Standards
Sustainable fashion isn't about perfection.
It's about making better decisions. Choosing more consciously sourced materials. Supporting brands that are transparent about how they operate. Buying less, but better.
And most importantly: choosing products that stay with you for years — not just seasons.
The question isn't "which brand sounds the most sustainable?" The question is: "which brand can actually prove it?"
Updated: April 2026