How to Tell if a Brand Is Sustainable, Not Greenwashing

You have a hoodie in your cart and a second tab open on the brand's Conscious Collection page. The swing tag says made with recycled materials. The About page says committed to a better future. You have no way of knowing whether either sentence cost the brand a single dollar to make true.

That gap is where greenwashing lives, and fashion has more of it than almost any other category. What follows is how to spot greenwashing without taking anyone's word for it. Six checks, most of them done in a second browser tab. The short version is that a brand doing the work can be checked, and a brand doing the copywriting can't.

The six checks:

• Register. Look the certification up in the body's own public directory.
• Scope. Read what that certification promises, and what it leaves out.
• Factories. Find a factory name and a city on the brand's site.
• Volume. Count the new styles landing each week.
• Percentage. A fibre claim without a number isn't a claim.
• Afterlife. Take-back and resale cost money, so they signal intent.

What Is Greenwashing in Fashion?

Greenwashing is marketing that spends more on the appearance of environmental responsibility than on the practice of it. In fashion it shows up as a capsule collection with a leafy name, a fibre claim with no percentage attached, or a mission statement written in the future tense.

The scale of it is measurable. Fashion Revolution's What Fuels Fashion? 2025 report reviewed 200 of the world's largest fashion brands and found an average score of 14%. The typical large brand discloses about a seventh of what the index asks it to.

That leaves you with a specific problem. The most confident-sounding sentence on a product page is usually the one with the least behind it, and the information that would settle the question sits somewhere else on the site, unlinked.

How Do You Check a Sustainability Certification?

A certification is worth what its register says it's worth, and the two that carry the most weight in fashion both publish one you can search.

GOTS, the Global Organic Textile Standard, grades in two tiers and the difference matters. A product carrying the Organic label contains a minimum of 95% certified organic fibres. Made with Organic covers anything from 70% up to 95%. GOTS also sets rules for chemical inputs, wastewater treatment, human-rights due diligence and traceability documentation, backed by annual on-site audits, so it governs the supply chain and not the fibre alone. Its certified suppliers database lets you look a company up by name.

B Corp certification requires a minimum verified score of 80 on the B Impact Assessment, checked by an independent team against documentary evidence, with recertification on a three-year cycle. Every certified company appears in a public directory.

Kotn shows what good behaviour looks like here. Its footer links the B Corp badge straight through to its own directory entry, so the check takes one click. On its about page the brand describes itself as "a certified B Corporation voted Best for the World™, with the fourth-highest B Impact Score of apparel brands in North America". Read the directory entry before you read the sentence. A brand that shows you a badge and hides the licence number has told you something.

What Does Each Sustainability Label Cover?

Some certifications cover the planet and some cover your skin, and a brand can lean on the second while sounding like the first.

OEKO-TEX STANDARD 100 is the clearest case. OEKO-TEX describes it on its own site as "a label for textiles tested for harmful substances", with every thread, button and accessory tested against a list of over 1,000 of them. It's a human-health certification. It says nothing about water use, emissions, wages or where the fibre came from.

Then look at how it gets presented. Girlfriend Collective makes activewear from recycled plastic bottles and puts the certification on its homepage as "OEKO-TEX Standard 100 Certified - Sustainable - Safe on skin, kind to the planet". The certification is real and the recycled-bottle sourcing is a separate and genuine thing, so there's substance behind both halves of that line. What's worth practising is reading the badge for what it certifies. STANDARD 100 covers what's in the fabric, and "kind to the planet" is a broader claim that a different body would have to verify. Brands across the category write these two ideas as one phrase. Learning to separate them is most of this skill.

Fair Trade Certified rewards a closer look for the opposite reason. A certified factory meets over 100 compliance criteria covering social responsibility, environmental responsibility, worker participation and economic development. On every certified product sold, the brand pays a Community Development Premium that goes to the workers, who elect a Fair Trade Committee to decide where it's spent. Factory partners have generated $100M in those funds so far.

Does the Brand Name Its Factories?

A brand that knows where its clothes are made will name the factory. That one question separates the disclosures worth reading from the ones written by a marketing team.

Everlane publishes 22 factories by name, each with a city and a product category. Linea Aqua in Hanwella does swimwear. Wirth in Dois Irmãos does shoes. The page also links a factory-details spreadsheet and a Transparency Pledge compliance statement, which makes the claim auditable by someone who isn't you. A factory list answers where clothes are made, which is one question of several, and we look at the wider picture in is Everlane fast fashion.

Organic Basics lists 11 facilities across Indonesia, India, Egypt, Vietnam, Thailand, Turkey and China, and publishes impact reports for 2023, 2024 and 2025. Three consecutive years is the useful part. One report is a launch. Three is a habit.

Veja built a second website for the job. project.veja-store.com carries separate pages on rubber sourcing, cotton, production, CO2 emissions and fair trade, alongside the brand's statement that its sneakers "are produced in Brazil and Portugal, in factories that respect workers' rights".

Set any of those against a paragraph about caring for the planet. One costs money to produce and can be checked. The other costs an afternoon.

How Many New Styles Does the Brand Add Each Week?

Counting new arrivals is the fastest check here, and it needs no certification knowledge at all. Open the brand's new-in page and count.

Fast fashion means cheap, trend-led clothing designed to be replaced within a season, and the defining number is how many new styles land per week. A brand adding several thousand of them can't offset that with an organic cotton capsule, because the volume is the impact.

This is the test that catches what certifications miss. A brand can hold a legitimate fibre certification on one capsule collection while the rest of the range moves at the pace of a news feed. It's also the test that starts the most arguments, which is why we run it brand by brand. Is Shein fast fashion and is Zara fast fashion are the two clearest cases. Is Lululemon fast fashion is the one that surprises people.

A small permanent range that restocks is a different business from a large one that refreshes, and you can see which you're looking at in about thirty seconds.

How Do You Read a Material Claim?

"Made with recycled materials" is a sentence with the number taken out, and the number is the claim.

GOTS splits its labels at 95% and 70% for a reason. A piece that's 70% organic cotton and 30% conventional is a different product from one that's 96% organic, and only one of them can carry the Organic label. A brand making a fibre claim without a percentage has chosen to withhold the part that would settle it.

Two more worth watching. Recycled polyester is still polyester, so it sheds microplastic in the wash exactly as virgin polyester does, and sourcing it from ocean plastic changes nothing about that. "Vegan leather" is usually polyurethane. The word vegan is about the animals, and the material is still plastic.

Good material pages name each fibre on its own. Organic Basics lists organic cotton, recycled nylon, responsible wool, TENCEL Lyocell, TENCEL Modal and LENZING ECOVERO Viscose separately instead of grouping them under one heading. Reformation built its reputation on this kind of disclosure, and we weighed how well it holds up in is Reformation fast fashion.

The Ethical Fashion Checklist to Run Before You Buy

Deciding whether a brand is sustainable comes down to six checks. Five minutes in a second tab covers them.

1. Find the licence number. If a brand claims GOTS or B Corp, look it up in the GOTS supplier database or the B Corp directory. A badge with no traceable entry behind it's decoration.
2. Read what the label covers. OEKO-TEX covers harmful substances, which is a question about your skin rather than the planet. Fair Trade Certified covers pay and factory conditions against over 100 criteria, while GOTS covers fibre content plus the chemicals and the labour behind it.
3. Look for named factories. A factory name and a city, on the brand's own site. If the supply chain section talks about values instead of places, you have your answer.
4. Count the new arrivals. Thirty seconds on the new-in page tells you the business model.
5. Ask for the percentage. No number attached to a fibre claim means no claim.
6. Check what happens afterwards. Take-back and resale cost a brand money, which is what makes them a better signal than a pledge. Girlfriend Collective runs a take-back programme and a resale marketplace.

Two or three of these settle most decisions. Fail four and you already know. Quince is a good one to practise on, and we ran the full set in is Quince fast fashion.

Where This Checklist Gets Uncomfortable

This method has a bias worth naming out loud. It rewards brands with the budget to document themselves. Documentation and low impact are different things.

Fashion Revolution says as much itself. The organisation is explicit that a transparency score measures disclosure and isn't a sustainability rating. A brand can publish a great deal of information and still make far too much clothing.

Everlane carries the same caution in its own wording if you read it closely. The about page states the aim as "a score of 90 or above for every factory" on compliance audits. That's a goal, written as a goal. The result is a different document, and the brand doesn't print it next to the sentence.

Certification costs money too. A small maker producing a hundred pieces a year in one workshop may hold nothing on this list and still beat every brand in this article on impact per piece, because the arithmetic of scale does work that paperwork can't.

The brands that pass these checks also tend to cost more per piece than the ones that fail, and that's a constraint rather than a moral failure. Cost per wear, which means the price divided by the number of times you'll wear it, closes part of the gap. It doesn't close all of it.

Reputation isn't one of the six checks either. Patagonia has the strongest reputation in the category and the question still deserves the same tests, which is why we ran them in is Patagonia fast fashion. And the lowest-impact piece available to you is the one already hanging in your wardrobe. Every check here applies to something you have decided to buy. The prior question is whether you need it.

What to Do Before Your Next Order

Pick the check that fits the time you have. Thirty seconds gets you the new-arrivals count, the single most predictive number on any fashion site. Five minutes gets you the certification register and the factory list, which together settle most cases. Anything beyond that's for brands you expect to buy from again.

If you want somewhere to start rather than something to avoid, our guide to affordable non fast fashion brands is built for shoppers on a budget, and ethical brands like Shein covers the trend-led end without the volume problem.

Then run the six checks on those too. That's the point.

If you purchase through our links, we may receive a commission. Our editorial team is independent and only endorses brands we believe in.