How To Spot Greenwashing in Sustainable Swimwear

How to Spot Greenwashing in Sustainable Swimwear

As sustainable swimwear became trendy between 2020 and 2025, hundreds of brands adopted eco-friendly language without fundamentally changing their practices. Here’s how to see through the marketing and find brands with genuine commitment.

Vague Buzzwords Without Proof

Red flags include phrases like “eco-friendly,” “ocean-inspired,” “green collection,” or “conscious line” with no specific information about fabric composition, certifications, or factory standards. A genuine sustainable brand will name exact materials—ECONYL®, REPREVE®, EVO by Fulgar®, etc.—and state precise recycled content percentages. If you can’t find these details after a quick check of their website, that’s your answer. Keep in mind that the industry minimum of sustainable fabric needed to include in swimwear to call it "sustainable" is 10%. The best brands will likely have a much higher percentage, typically around 70-80%. *Remember, they still need to use at least a small percentage of elastane to help with the swimsuit structure and stretch! 

No Factory or Wage Transparency

When a brand says “ethically made overseas” without ever naming the country, facility, or third-party audits, be skeptical. Legitimate ethical manufacturing involves documentation: WRAP certification, BSCI audits, Fair Trade labels, SA8000 compliance, OEKO-Tex 100, GRS, and more. Ask questions: Which country? What audits? What certifications? Brands with nothing to hide will have answers readily available. Those hiding behind generic language usually have something to hide.

Overemphasis on a Single “Green” Feature

Watch for suits marketed solely on “recycled lining” while the outer fabric is virgin polyester, or brands touting “plastic-free packaging” while overproducing dozens of micro-trend styles yearly or dropping dozens of new styles every few weeks. Sustainability requires addressing the full lifecycle—from raw material sourcing to end-of-life recyclability. A recycled hangtag doesn’t offset hundreds of disposable designs.

Unrealistic “Biodegradable” Claims

Fully biodegradable swimwear with conventional elastane essentially doesn’t exist yet—the stretch component resists breakdown. Be wary of claims like “fully compostable bikini” without clear third-party verification and scientific documentation. For example, Amni Soul Eco is a compostable fabric under the right conditions, however, unless the brand is using a specialized biodegradable polyester, it likely cannot fully be broken down yet. Any brand making these claims should be able to point to specific testing and certification. If they can’t, walk away.

Lack of Longevity and Care Guidance

Brands focused on sales volume rarely mention care instructions, repair options, or how long their suits should last. Compare this to Do Good Surf Club and Patagonia, both of whom actively gives tips on repairs, care guides and encourages customers to use their gear as long as possible. If a brand never discusses how to extend your suit’s life, they’re more interested in your next purchase than in genuine sustainability.

 

FAQs re: Sustainable Swimwear

These questions address common concerns not fully covered above, especially around maintenance, microplastics, accessibility, and verification.

Is recycled swimwear really better for the ocean if it still sheds microplastics?

Recycled fabrics reduce demand for new fossil-fuel-based materials and help remove existing waste like ghost fishing nets from marine environments. However, microfibre shedding during washing remains a legitimate concern across all synthetic swimwear. You can minimize impact by washing suits less frequently (a rinse often suffices), using microfibre-catching bags or laundry filters, and running cold, gentle cycles. The net environmental benefit of recycled materials still outweighs virgin synthetics, but thoughtful care amplifies that advantage.

Can I find truly sustainable swimwear on a tight budget?

Most leading sustainable brands price suits between $60–$150, which can feel steep. Options exist: buy secondhand from platforms like Poshmark or Depop, check brand resale sections, watch for seasonal sales, or prioritize purchasing one high-quality suit instead of several cheaper alternatives. A single durable piece serves you better—and costs less long-term—than multiple disposable suits that need constant replacement.

How long should a good sustainable swimsuit last?

With proper care, a well-made suit from quality recycled or bio-based fabric should last 3–5 summers of regular use, sometimes longer. Signs it’s time to retire a suit include thinning fabric, significant loss of elasticity (the suit doesn’t spring back after stretching), or see-through areas. When your suit reaches end of life, repurpose it for training, home pools, or crafting projects rather than sending it straight to landfill.

Are natural-fiber swimsuits like cotton or hemp more sustainable?

While natural fibers sound environmentally friendly, they perform poorly in swimwear applications. Cotton stretches out, takes forever to dry, and breaks down quickly in chlorinated or salty water. Hemp shares similar limitations. For active swimwear that needs to withstand real conditions, high-quality recycled synthetics with good care remain the most practical sustainable choice. Natural fibers work better for cover-ups, boardshorts for casual wear, and kaftans meant for lounging rather than swimming.

How can I verify a brand’s sustainability claims before buying?

Take these steps before adding anything to your cart: check for specific fabric names (ECONYL®, REPREVE®) with exact percentages rather than vague “recycled blend” language. Look for independent certifications—B Corp, Fair Trade, OEKO-TEX®, WRAP, or BSCI—that require third-party verification. Read sustainability or impact reports dated 2023–2026 that include actual numbers rather than aspirational goals. Search for third-party reviews from organizations like Good On You that evaluate labor and environmental practices independently. Brands with genuine commitment make this information easy to find; those hiding behind vague claims make you hunt for answers.

Your next swimsuit purchase is a vote for the kind of fashion industry you want to support. Armed with this knowledge, you can enter any shopping experience—online or in-store—with the confidence to distinguish genuine sustainability from hollow marketing. Start with one well-made suit that fits your life and your values, then love it for years to come.