As consumers increasingly seek to align their purchasing habits with environmental and social values, the swimwear industry is undergoing a significant transformation. Once dominated by fast-fashion cycles and synthetic materials, the market is now seeing a powerful surge in brands committed to responsible practices. This shift reflects a growing awareness of swimwear’s environmental footprint, from its material origins to its end-of-life impact, prompting a re-evaluation of how beachwear and activewear are produced and consumed. Platforms like Good On You, known for their rigorous ratings system, are curating highly-rated brands that offer consumers "Good" and "Great" options for a responsible wardrobe overhaul, ensuring that style, comfort, and durability do not come at the planet’s expense.
The Environmental Imperative: Unpacking Swimwear’s Material Footprint
The fundamental challenge in sustainable swimwear lies in its very composition. Traditionally, swimwear relies heavily on virgin synthetic fabrics such as nylon, polyester, and spandex. These materials, prized for their elasticity, quick-drying properties, and resistance to chlorine and saltwater, are derived from fossil fuels. Their production is energy-intensive, contributing to greenhouse gas emissions and reliance on finite resources. Beyond manufacturing, these plastic-based materials pose a long-term environmental threat. Every wash cycle releases microfibres—tiny plastic particles—into waterways, eventually making their way into oceans. These microplastics accumulate in marine ecosystems, harming wildlife and potentially entering the human food chain. A helpful guide from Good On You further elaborates on the pervasive issue of microfibre release and its ecological consequences, underscoring the urgent need for material innovation. The pervasive nature of these pollutants means that a single trendy bikini, discarded after a few seasons, can contribute to environmental degradation for centuries. The industry’s historical reliance on these non-biodegradable materials has created a significant legacy of pollution, challenging brands to find practical yet planet-friendly alternatives.
Innovations in Sustainable Swimwear Materials and Production
Responding to this environmental imperative, a new generation of swimwear brands is actively incorporating lower-impact materials and adopting more sustainable production methods. The most prominent innovation is the use of ECONYL and recycled nylon. ECONYL, for instance, is a regenerated nylon yarn made from waste materials such as abandoned fishing nets, fabric scraps, carpet flooring, and industrial plastic from landfills and oceans worldwide. This process not only diverts waste from polluting natural environments but also significantly reduces the need for virgin petroleum, cutting down on CO2 emissions and energy consumption compared to conventional nylon production. Similarly, other forms of recycled polyester are being developed from post-consumer plastic bottles, transforming what would otherwise become landfill waste into durable, high-performance fabrics.
Another promising material emerging in swimwear is hemp. Known for its natural strength, durability, and minimal environmental impact during cultivation (requiring less water and no pesticides compared to conventional cotton), hemp offers an antimicrobial and UV-resistant alternative. Brands like Natasha Tonic champion hemp swimwear, highlighting its benefits for both skin and ocean health, and further reducing their footprint by hand-printing each piece, ensuring uniqueness and reducing industrial chemical use.
Beyond materials, sustainable practices extend to the entire supply chain. This includes efforts to reuse and recycle water in manufacturing processes, as demonstrated by LONDRÉ, which sources recycled plastic bottles from streets and beaches in Taiwan and reuses process water. Brands are also focusing on reducing energy consumption, minimising emissions, and adopting certifications such as Bluesign, which ensures environmental performance and worker safety throughout the supply chain. The emphasis on timeless designs also plays a crucial role, encouraging consumers to invest in durable pieces that resist the allure of fleeting trends, thereby extending product lifespan and reducing overall consumption. This focus on longevity and quality over quantity is a cornerstone of the slow fashion movement within the swimwear sector.
Global Leaders in Ethical and Sustainable Swimwear
The movement towards responsible swimwear is a global phenomenon, with pioneering brands emerging from diverse regions, each contributing unique approaches to sustainability.
North America (USA and Canada):
The North American market has seen several brands take significant strides. Natasha Tonic stands out for its pioneering use of natural hemp fibre, which is not only antimicrobial and UV resistant but also a healthier choice for the skin and oceans. Each piece is meticulously hand-printed, ensuring individuality. Sizes range from XS-XL. Patagonia, a well-established name in outdoor apparel, extends its robust sustainability ethos to swimwear. The brand is renowned for its "Good" labour practices, utilising recycled polyester instead of virgin materials, and actively committing to reducing its energy use and emissions. Patagonia’s range spans 2XS-3XL, catering to a broad audience. Canadian brand LONDRÉ adopts a minimalist aesthetic while making a substantial environmental impact. Their swimwear is crafted from recycled plastic bottles collected from Taiwanese streets and beaches, with water reused and recycled in their production. Furthermore, LONDRÉ actively supports women’s health and environmental initiatives, having donated over $10,000 to organisations like Amazon Watch and the Yellow Hammer Fund. They offer an inclusive size range from XS-5XL.
Outerknown, co-founded by surf champion Kelly Slater, epitomises the blend of style, function, and environmental protection. Their Bluesign certification guarantees responsible practices in textile manufacturing, and their partnership with the Fair Labour Association ensures ethical working conditions. Outerknown’s swimwear is available in sizes XS-2XL. For luxury seekers, Sage Larock produces timeless swimwear and activewear in LA from high-quality Italian recycled plastic fabric. A percentage of their profits is dedicated to marine conservation non-profits, demonstrating a commitment beyond production. Sage Larock offers sizes XS-L. Reformation, a Los Angeles-based brand known for its "killer clothes that don’t kill the environment," extends its ethical framework to swimwear, ensuring a proportion of its suppliers pay a living wage and providing training to improve working conditions across its supply chain. Their inclusive range is available in sizes XS-3XL.
Australia and New Zealand:
Known for their vibrant beach culture, these regions are naturally at the forefront of sustainable swimwear. Spell, an Australian fashion brand inspired by global travels and vintage aesthetics, designs and samples its collections in Byron Bay, with responsible production spanning international factories. Their garments are typically available in sizes 2XS-2XL. peony, a luxury Australian swimwear brand, consciously crafts pieces from recycled and lower-impact fabrics. Their factories are certified by Social Accountability International (SA8000), and they trace most of their supply chain, ensuring ethical production. peony’s collection is available in sizes XS-XL. For children’s wear, Oobi offers stylish girls’ fashion, swimwear, and homewares. The brand uses low-impact, non-toxic dyes, avoids animal products, and uses sea freight for transport to reduce its climate impact. Oobi also has a pre-loved option via Retykle, promoting circularity.
Europe and the UK:
European brands are also making significant contributions to sustainable swimwear. ColieCo, based in Portugal, offers uniquely fun and striking designs in lingerie, underwear, and swimwear, all handmade in-house from sustainably-sourced fabrics. They aim to prove that ethical and sustainable fashion can also be adventurous and affordable, with sizes from 2XS-3XL. Swiss brand NIKIN integrates environmental action directly into its business model: a tree is planted with every product purchased, symbolising a tangible commitment to reforestation. Their products are available in sizes XS-2XL. Anekdot, a Berlin-based brand, excels in circularity by upcycling production leftovers, deadstock, and vintage trimmings to create limited edition designer underwear, swimwear, and loungewear. Most products are found in sizes XS-XL. Italian brand CASAGiN designs apparel for a conscious lifestyle, extending its sustainable philosophy to swimwear, with items available in sizes XS-2XL.
TWOTHIRDS, a brand deeply connected to ocean conservation, manufactures all products locally to minimise its carbon footprint and audits all final stages of production. Their focus on the immense value of oceans is reflected in their commitment to style and substance. Sizes are available from XS-L. French menswear label Bluebuck combines a playful, adventurous spirit with a commitment to durability and sustainability. They produce locally using GOTS certified cotton and recycled marine plastic, with items in sizes XS-2XL. Kampos, a luxurious Italian brand, actively raises awareness about over-fishing and marine pollution. Their unique pieces are made from recycled plastic bottles, fishing nets, and other lower-impact organic fabrics, available in sizes XS-2XL. Danish brand Underprotection merges ethics and aesthetics, creating swimwear from lower-impact materials like organic cotton. They use recycled or biodegradable packaging and partner only with certified factories, advocating for fair working conditions and wages as human rights. Their range is available in XS-XL. Finally, Swedish brand ASKET focuses on timeless wardrobe essentials, including swimwear, with revolutionary sizing and fair pricing. They forgo seasonal collections for a permanent collection, emphasising durability and direct-to-consumer sales. Their range is available in sizes 2XS-2XL.
Rest of the World:
The global reach of sustainable swimwear innovation extends further. Loop Swim, co-founded by women from the US and India and headquartered in Shanghai, exemplifies circular design by transforming post-consumer plastic bottles into high-quality REPREVE UP50+ sun-protective swimwear for the entire family. Their trendless designs are engineered for shape and colour retention, available in sizes XS-XL. From India, The Summer House creates elegant women’s wear using locally made, lower-impact fabrics and partners with local artisans and NGOs, fostering community development alongside sustainable fashion. Their range is available in sizes XS-XL. Tokyo-based Koraru, named after the Japanese pronunciation of ‘coral,’ designs swimwear based on circularity principles, using lower-impact materials, offering a recycling program, and tracing parts of its supply chain. Sizes are available from XS-XXL.
The Role of Consumer Guidance and Future Implications
The emergence of comprehensive rating systems like Good On You is crucial in guiding consumers through the complexities of sustainable fashion. By assessing brands’ impact on people, the planet, and animals, these platforms empower individuals to make informed choices, fostering transparency and accountability within the industry. The collective impact of these brands demonstrates a tangible shift from purely profit-driven models to those integrating environmental stewardship and social responsibility.
However, challenges remain. Scaling sustainable production to meet growing demand while maintaining ethical standards is a constant balancing act. Educating consumers on the true cost and value of durable, responsibly made swimwear versus the fleeting appeal of fast fashion is an ongoing effort. Furthermore, technological advancements are still needed to fully mitigate issues like microplastic shedding, with innovations in washing machine filters and fabric treatments offering potential solutions. The broader implication of this movement is a redefinition of luxury and necessity in fashion, where environmental and ethical considerations are not merely add-ons but core components of product value. As highlighted by the continuous updates from editors, such as the article’s update on May 22, 2025, the landscape of sustainable swimwear is dynamic, with ongoing research, new brand entries, and evolving best practices. The future of swimwear will undoubtedly be defined by continuous innovation, stricter industry standards, and an ever-more conscious consumer base, all striving for a harmonious relationship between human activity and the planet’s delicate aquatic ecosystems.
