How to spot greenwashing in fashion

The most common greenwashing tactics in fashion

Vague language with no substance: terms like "eco," "green," "conscious," "responsible," "mindful," and "planet-friendly" have no agreed definition in fashion and are not regulated. Any brand can apply them to any product. When a brand's environmental credentials begin and end with language like this, there is nothing behind it to verify. Recycled polyester framed as a sustainability story: rPET (recycled polyester, typically from plastic bottles) is frequently presented as a meaningful environmental choice. It is a marginal production-phase improvement. It still sheds microplastic fibers at similar rates to virgin polyester. It still does not biodegrade. The "recycled" framing implies end-of-life benefit that does not exist. "Sustainable cotton" without certification: GOTS-certified organic cotton requires verified farming practices, no synthetic pesticides, and chemical controls through processing. "Sustainable cotton" without a certification number attached to it is an unverified claim with no standard meaning. Organic fiber claims without supply chain verification: organic fiber at the farm level can be mixed with conventional fiber or processed with restricted chemicals before reaching the finished garment. GOTS covers the full chain; "organic fiber" language on its own does not. "Carbon neutral" without a published methodology: carbon neutrality claims in fashion typically rely on offsetting rather than emission reduction, and offset quality varies enormously. A brand calling itself carbon neutral without publishing its calculation methodology, baseline, and offset registry is asking you to trust an unverifiable claim.

What recycled polyester actually is

Recycled polyester — widely sold as rPET — is most commonly made by melting down plastic bottles and re-extruding them into fiber. The production energy required is somewhat lower than producing virgin polyester from petroleum feedstock. Some brands use post-consumer textile waste rather than bottles, which addresses a real end-of-life problem. What recycled polyester does not change: it is still a plastic fabric. It still sheds microplastic fibers with every wash — the fiber fragmentation that occurs during laundering is a function of the synthetic fiber structure, not whether the feedstock was recycled or virgin. Studies have found rPET and virgin polyester shed microfibers at comparable rates. Recycled polyester does not biodegrade. A garment made from rPET will persist in landfill for hundreds of years just as a garment made from virgin polyester does. The environmental benefit is in production energy and in diverting plastic from disposal streams — real but limited, and not the transformation of polyester into a sustainable material that some marketing implies.

The "conscious collection" problem

Major fast fashion brands including H&M, Zara, and Uniqlo run sustainability-branded lines — H&M Conscious, Zara Join Life, and similar — that represent a small fraction of each brand's total output. These collections have faced significant regulatory scrutiny. In 2022, the Norwegian Consumer Authority determined that H&M's use of the Higg Index scores — a supply chain tool — in consumer-facing marketing was misleading because the scores did not support the environmental claims being made. H&M subsequently dropped the scores from consumer marketing. The structural problem: these brands' business models are based on high-volume, rapid-turnover production at low price points. That model is structurally inconsistent with meaningful sustainability regardless of what materials a small collection uses. A brand making 3,000 styles per year that designates 200 of them as "conscious" has not become a sustainable brand. The purpose of these collections is primarily reputational — they create a halo effect that allows consumers to feel better about shopping at the brand without the brand having to change what it fundamentally does.

What to look for instead

Verifiable third-party certifications: look for certifications that have publicly searchable certification numbers, so you can confirm they are real and current. GOTS (Global Organic Textile Standard): covers organic farming and chemical controls through the full supply chain to the finished product. The most comprehensive standard for organic fiber clothing. OEKO-TEX STANDARD 100: tests the finished product for harmful substances. Every product component must pass. Certification numbers can be verified at oeko-tex.com. B Corp: a business-level certification covering environmental and social performance across operations. More demanding to obtain than product-level certifications. RWS (Responsible Wool Standard): for wool, verifies humane animal treatment and sustainable land management through the supply chain. ZQ Merino: a New Zealand-based standard for merino wool covering animal welfare, environmental management, and social criteria. Fiber transparency: brands that tell you specifically what fibers they use, in what percentages, sourced from where, are doing more than most. Vagueness about fiber composition often correlates with vagueness about sourcing. Supply chain disclosure: brands that publish their factory names and locations, and make audit results available, have created accountability that vague claims cannot substitute for.

Questions to ask a brand

What percentage of your total product range — not your sustainability collection — uses certified materials? A brand using GOTS-certified cotton in 5% of its range while marketing itself as a sustainable brand is not a sustainable brand. Can you show me your certification number? GOTS, OEKO-TEX, RWS, and ZQ all have searchable databases. A real certification has a real number. If a brand cannot provide one, the certification claim is not verifiable. What is your fiber breakdown? What percentage of your products by revenue or unit use synthetic fiber vs natural fiber vs recycled material? Where are your garments made? Supply chain transparency starts with knowing who makes the product. Brands that cannot answer this do not have visibility into their own operations — which makes substantive sustainability claims impossible. What does your carbon neutral claim actually mean? If a brand is claiming carbon neutrality, ask for the methodology: what is the baseline, how are emissions calculated, what offsets are used and from which registry, and what is the plan to reduce rather than offset emissions over time.

Common questions

What is greenwashing in fashion?

Greenwashing is when brands make environmental claims — in marketing, product names, or labels — that overstate or misrepresent their actual credentials. In fashion it is widespread because no universal regulatory standard exists for environmental claims on clothing.

Is recycled polyester sustainable?

Marginally in production. Not at end of life. Recycled polyester still sheds microplastic fibers at similar rates to virgin polyester and does not biodegrade. The benefit is limited to reduced production energy and diversion of plastic from waste streams.

How do I know if a clothing brand is really sustainable?

Look for verifiable third-party certifications with searchable certification numbers (GOTS, OEKO-TEX, B Corp, RWS, ZQ). Ask what percentage of their full range — not just a special collection — uses certified materials. Check whether they publish supply chain information.

What certifications prove a brand is not greenwashing?

No certification is a complete guarantee, but GOTS, OEKO-TEX STANDARD 100, B Corp, RWS, and ZQ are verifiable by certification number. They are meaningfully different from unverifiable brand claims and indicate a real commitment has been made.

Is H&M's Conscious Collection actually sustainable?

Not substantively. The Norwegian Consumer Authority found H&M's sustainability scoring misleading in 2022. The collection represents a small fraction of H&M's output. A business model built on high-volume, low-cost, rapid-turnover production is structurally incompatible with meaningful sustainability regardless of what a sub-collection is made from.