Sustainable Swimwear: The Brands Actually Making a Difference

I used to think sustainable swimwear meant sacrificing style. Worthy but dull. Earthy tones and shapeless cuts that screamed “I care about the planet” but whispered “I gave up on looking good.” Thankfully, that era is over. The sustainable swim market in 2026 is producing some of the most beautiful, well-constructed pieces I’ve seen at any price point, and the gap between eco-friendly and conventional swimwear has essentially closed.

The Fabrics That Matter

The biggest shift in sustainable swimwear has been fabric technology. ECONYL— a regenerated nylon made from ocean waste, fishing nets, and industrial plastic — is now the gold standard. It performs identically to virgin nylon in terms of stretch, chlorine resistance, and UV protection, but it’s made from material that would otherwise be polluting our oceans. Several brands also use REPREVE, a recycled polyester fibre made from plastic bottles, which is particularly good for printed pieces where colour vibrancy matters.

Beyond the fabric itself, look for brands that use plant-based or water-based dyes, recycled packaging, and transparent supply chains. The labels doing this properly aren’t shy about sharing the details.

The Brands Leading the Way

Vitamin A is the brand I recommend most when people ask where to start with sustainable swim. Founded in California by Amahlia Stevens, they’ve been using recycled and plant-based fabrics since before it was fashionable to do so. Their EcoLux fabric is soft, sculpting, and genuinely beautiful — the California High-Leg one-piece is one of the most flattering swimsuits I own, and the fact that it’s made from recycled materials is almost secondary to how good it looks. Prices range from £120 to £220, which feels reasonable for the quality.

Monday Swimwear has been steadily increasing its sustainable range, with several collections now made from ECONYL. What I appreciate about Monday’s approach is that they haven’t created a separate “eco line” — they’re integrating sustainable fabrics into their mainline collections, which normalises the choice rather than making it feel niche.

Staying Summer deserves a mention for being sustainable from day one. Every piece uses ECONYL, their packaging is entirely plastic-free, and they operate a repair programme so you can extend the life of your swimwear rather than replacing it. Their aesthetic is minimal and Scandinavian-influenced, which won’t be for everyone, but the quality is outstanding.

Ark Swimwear, a London-based brand, makes everything from ECONYL and ships in compostable packaging. Their shapes are more trend-led than some sustainable brands, with asymmetric cuts and bold colours that feel current without being disposable.

What to Look For (and What to Avoid)

Be wary of brands that slap “sustainable” on their marketing without specifics. If a brand can’t tell you exactly what their fabric is made from, where it’s manufactured, and what their packaging consists of, the claim is likely greenwashing. Genuine sustainable brands are transparent to the point of boring you with supply chain details — and that’s exactly what you want.

The simplest sustainable choice, though, is one most people overlook: buy less, buy better. A single well-made swimsuit that lasts five years is infinitely more sustainable than five cheap bikinis that fall apart after one summer. Invest in quality, care for your pieces properly — rinse after every wear, avoid wringing, dry flat in the shade — and your swimwear drawer becomes more sustainable by default.