The global fashion industry, a colossal economic engine, has long grappled with the environmental and social costs embedded in its supply chains. As consumer awareness grows and the urgency of climate action intensifies, a paradigm shift towards sustainable practices is no longer a niche concern but a fundamental imperative. This transformation is particularly critical in sectors like swimwear, where the reliance on synthetic, plastic-based materials presents a significant challenge to planetary health. Recognising this urgent need, discerning consumers are increasingly seeking brands that align with their values, offering products that are not only stylish and durable but also responsibly made. This comprehensive guide highlights leading swimwear brands from around the world that have been rigorously assessed for their commitment to environmental and social sustainability, earning "Good" and "Great" ratings from independent evaluators.
The Pervasive Environmental Impact of Conventional Swimwear
Swimwear, by its very nature, demands materials that are durable, elastic, quick-drying, and resistant to the corrosive effects of chlorine, saltwater, and UV radiation. Traditionally, these properties have been overwhelmingly met by synthetic fabrics such as virgin nylon, polyester, and spandex. While undeniably practical, these materials are derived from petrochemicals, making them inherently plastic-based. The production of virgin synthetics is a highly energy-intensive process, contributing to greenhouse gas emissions and depleting non-renewable resources.
Beyond their manufacturing footprint, these plastic-based textiles pose a significant environmental threat throughout their lifecycle. A critical, yet often overlooked, issue is the release of microfibres during washing. Each laundry cycle of synthetic garments can shed thousands of microscopic plastic filaments, which are too small to be filtered by most wastewater treatment plants. These microfibres then enter aquatic ecosystems, polluting oceans, lakes, and rivers. Marine life often ingests these particles, leading to internal injuries, starvation, and the transfer of toxic chemicals up the food chain, ultimately impacting human health. A report by the Ellen MacArthur Foundation in 2017 estimated that by 2050, there could be more plastic than fish in the ocean by weight, with microfibres being a substantial contributor to this growing plastic soup. The allure of fast fashion, encouraging consumers to purchase new, trendy bikini sets or one-pieces annually, exacerbates this problem, leading to a relentless cycle of production, consumption, and disposal that strains planetary boundaries.
A Chronology of Change: The Evolution of Sustainable Materials and Practices
The journey towards sustainable swimwear has been a gradual but accelerating one, marked by increasing scientific understanding of textile impacts and pioneering innovations in material science. For decades, the environmental footprint of clothing remained largely unaddressed by mainstream industry. However, the late 20th and early 21st centuries saw the emergence of a nascent environmental movement that began to question industrial practices.
The turning point for public and industry awareness around plastic pollution, particularly in oceans, gained significant momentum in the mid-2010s. Documentaries like "A Plastic Ocean" (2016) and widespread scientific reports on ocean gyres brimming with plastic waste brought the crisis into sharp focus. This heightened awareness spurred innovation within the textile industry, leading to the development and scaling of lower-impact alternatives for swimwear.
One of the most significant breakthroughs has been the advent of materials like ECONYL. Launched in 2011 by Aquafil, ECONYL is a regenerated nylon made from waste materials such as discarded fishing nets, fabric scraps, carpet flooring, and industrial plastic from landfills and oceans worldwide. The regeneration process involves depolymerising nylon waste back to its original monomer, which is then repolymerised into new nylon yarn. This closed-loop system drastically reduces the need for virgin resources and diverts vast amounts of waste from incineration or landfill, embodying the principles of a circular economy.
Similarly, the use of recycled polyester and recycled nylon from post-consumer plastic bottles has become more prevalent. Brands are increasingly investing in technologies to transform discarded PET bottles into high-performance fabrics suitable for swimwear. While these materials still release microfibres, their production reduces reliance on new petroleum, lowers energy consumption, and provides a valuable end-of-life solution for existing plastic waste.
Beyond synthetics, natural fibres like hemp are also gaining traction. Hemp is an incredibly versatile and sustainable crop, requiring minimal water, no pesticides, and enriching the soil it grows in. When processed into fabric, hemp offers natural antimicrobial properties, excellent UV resistance, and exceptional durability, making it a healthier choice for both the wearer and the marine environment. Its breathability and strength provide a luxurious feel and longevity that synthetic alternatives often struggle to match without advanced processing.
The shift extends beyond materials to manufacturing processes. Brands committed to sustainability are adopting practices such as reduced water and energy consumption, using non-toxic and low-impact dyes, and implementing closed-loop water systems in their factories. Furthermore, there’s a growing emphasis on ethical labour practices, with brands working towards fair wages, safe working conditions, and transparency across their entire supply chain, often verified by certifications like SA8000. The rise of local production models also helps to minimise carbon footprints associated with long-distance shipping. This concerted effort reflects a growing understanding that true sustainability encompasses environmental stewardship, social equity, and economic viability.
Driving Forces: Consumer Demand and Industry Standards
The escalating consumer demand for transparent, ethical, and sustainable products has been a powerful catalyst for change. Market research consistently indicates a strong preference, especially among younger demographics, for brands that demonstrate clear commitments to environmental protection and social responsibility. A 2022 survey by Statista showed that 60% of consumers worldwide consider sustainability an important purchasing criterion. This trend puts pressure on brands to innovate and integrate sustainable practices, or risk losing market share to more conscientious competitors.
In response, industry standards and certifications have become crucial benchmarks for verifying sustainability claims. Organisations like Bluesign provide independent auditing of the textile supply chain, ensuring that products are made with responsible use of resources and the lowest possible impact on people and the environment. Global Organic Textile Standard (GOTS) certification guarantees the organic status of textiles from harvesting of raw materials through environmentally and socially responsible manufacturing. Social Accountability International (SA8000) focuses on labour practices, ensuring fair working conditions and wages. These certifications provide consumers with a level of assurance that goes beyond mere marketing claims, fostering trust and accountability.
Global Leaders in Sustainable Swimwear: A Curated Selection
Leveraging a rigorous ratings system that evaluates brands’ impact on people, the planet, and animals, a selection of "Good" and "Great" rated swimwear brands from around the world stands out. These brands exemplify the industry’s evolving commitment to sustainability, demonstrating that style and environmental responsibility can indeed go hand-in-hand.
USA and Canada
Natasha Tonic
Based in the USA, Natasha Tonic distinguishes itself with a pioneering approach to swimwear fabric, centring its designs around natural hemp fibre. This choice is significant; hemp is not only antimicrobial and UV resistant but also renowned for its durability and minimal environmental footprint during cultivation. Unlike synthetic fibres, hemp cultivation requires significantly less water and no pesticides, and it actively regenerates soil health. Each piece from Natasha Tonic is a testament to artisanal craftsmanship, hand-printed to ensure uniqueness, offering customers a garment that is both healthier for their skin and for the planet’s oceans. The brand’s commitment extends to offering sizes from XS-XL, promoting inclusivity alongside sustainability. This dedication to natural materials and handmade artistry positions Natasha Tonic as a leader in truly eco-conscious swimwear.
Patagonia
A venerable name in outdoor apparel, Patagonia embodies a profound commitment to environmental stewardship. Their swimwear line reflects the brand’s overarching philosophy of designing durable, functional gear with minimal ecological impact. Patagonia’s "Good" labour practices are a result of their long-standing dedication to fair trade and worker well-being, often exceeding industry standards. Critically, their use of recycled rather than virgin polyester in much of their swimwear dramatically reduces reliance on petrochemicals and repurposes plastic waste. The brand’s active commitment to reducing energy use and emissions, alongside its well-known "Worn Wear" program that encourages repair and reuse, positions them as a holistic sustainability champion. Available in a broad size range from 2XS-3XL, Patagonia ensures that a commitment to the outdoors is matched by a commitment to the planet.
LONDRÉ
This Canadian minimalist swimwear brand is a shining example of circular design in action. LONDRÉ transforms recycled plastic bottles, meticulously sourced from the streets and beaches of Taiwan, into exquisite swimwear. This direct intervention in waste management not only cleans up polluted environments but also creates a valuable product. The brand’s manufacturing process is equally conscientious, with water reused and recycled to minimise consumption. Beyond its product, LONDRÉ actively engages in philanthropic efforts, having donated over $10,000 to vital organisations such as Amazon Watch, which works to protect the Amazon rainforest and indigenous rights, and the Yellow Hammer Fund, supporting reproductive freedom. This blend of material innovation, responsible manufacturing, and social impact makes LONDRÉ a standout brand, with a size range from XS-5XL catering to a diverse clientele.
Outerknown
Co-founded by legendary surf champion Kelly Slater, Outerknown seamlessly blends high-performance style with a profound commitment to environmental protection. The brand’s core mission is to create durable, comfortable clothing that respects natural resources. Their swimwear, like all their products, benefits from their Bluesign certification, a rigorous standard that ensures products are manufactured with responsible use of resources and minimal environmental impact. Outerknown’s partnership with the Fair Labour Association underscores its dedication to ethical supply chains and the well-being of garment workers. Offering sizes XS-2XL, the brand appeals to consumers who seek both athletic functionality and unwavering ethical standards.
Sage Larock
Sage Larock, a luxury brand based in Los Angeles, crafts timeless swimwear and activewear with an emphasis on local, ethical production. Each stunning piece is made in-house by a small, dedicated team, ensuring meticulous quality control and supporting local craftsmanship. The brand utilizes high-quality Italian recycled plastic fabric, demonstrating a commitment to repurposing waste into luxurious, long-lasting garments. Furthermore, Sage Larock dedicates a percentage of its profits from each sale to marine conservation non-profits, directly contributing to the protection of the very environments its swimwear is designed for. This fusion of luxury, local production, and direct environmental impact is available in sizes XS-L.
Reformation
The LA-based brand Reformation has built its reputation on the mantra of creating "killer clothes that don’t kill the environment." Their swimwear collection reflects this ethos, combining contemporary style with advanced sustainable practices. Reformation is notable for ensuring that a proportion of its suppliers pay a living wage, a crucial step towards equitable labour practices in the fashion industry. They also actively provide training to their suppliers, working collaboratively to improve working conditions throughout their supply chain. This holistic approach to social and environmental responsibility is woven into their business model, with their range available in sizes XS-3XL, demonstrating a commitment to both style and ethics.
Australia and New Zealand
Spell
Hailing from Byron Bay, Australia, Spell is a fashion brand that infuses its designs with inspiration from global travel, vintage aesthetics, and cherished childhood memories. While their swimwear captures a distinct bohemian charm, their commitment to sustainability is equally strong. Spell proudly designs and samples its collections in Byron Bay, maintaining a local creative hub, while responsibly producing garments in audited factories worldwide. This balance ensures quality and ethical oversight across their supply chain. Most garments are available in sizes 2XS-2XL, offering inclusive sizing for their distinct style.
peony
peony is an Australian luxury swimwear brand that consciously crafts its collections from recycled and lower-impact fabrics. The brand places a high priority on ethical manufacturing, with its factories certified by Social Accountability International (SA8000), assuring fair working conditions and wages. peony also demonstrates strong supply chain transparency by tracing most of its production process, allowing consumers to understand the journey of their garments. Available in sizes XS-XL, peony offers sophisticated designs with a clear conscience.
Oobi
Oobi is an Australian brand specializing in girls’ fashion, swimwear, homewares, and lifestyle products. Beyond creating stylish and playful clothes for children, Oobi is committed to using low-impact, non-toxic dyes throughout its range, ensuring safety for both children and the environment. The brand also makes a point of using no animal products and prioritises sea freight for product transportation, significantly reducing its climate impact compared to air freight. Oobi’s dedication to ethical production and sustainable practices makes it a responsible choice for children’s wear.
Europe and the UK
ColieCo
Based in Portugal, ColieCo is recognised for its uniquely fun, simple, and striking designs in lingerie, underwear, and swimwear. The brand was founded on the principle that ethical and sustainable intimates could still be adventurous and affordable. ColieCo crafts all its pieces in an in-house studio in Portugal, ensuring close oversight of labour conditions and quality. Exclusively using sustainably-sourced fabrics, they minimise their environmental footprint while maximising creative expression. Their range, available in sizes XS-XL, offers a vibrant and responsible choice for consumers.
NIKIN
The Swiss brand NIKIN stands out with a powerful and direct environmental initiative: planting a tree for every product purchased. This tangible commitment allows consumers to wear their morals literally, displaying "tree pride" with each item. NIKIN’s swimwear, like its other products, reflects this dedication, crafted with consideration for its environmental impact. This simple yet effective model resonates with environmentally conscious consumers, offering products in sizes XS-2XL.
Anekdot
Anekdot, based in Berlin, is a brand that champions circularity and artisanal craftsmanship in its designer underwear, swimwear, and loungewear. Their unique approach involves upcycling materials from production leftovers, deadstock fabrics, and vintage trimmings. This process not only diverts waste from landfill but also results in limited edition products, each with a unique story and reduced environmental impact. Handmade in Berlin, Anekdot’s exquisite intimates offer a truly sustainable and exclusive choice, with most products available in sizes XS-XL.
CASAGiN
The Italian brand CASAGiN designs apparel for individuals committed to a more sustainable and conscious lifestyle. Their swimwear, like their broader collection, is crafted with an emphasis on environmental responsibility and timeless design. By fostering ethical production practices and utilising lower-impact materials, CASAGiN empowers consumers to make choices that align with their values, extending beyond their wardrobe. Most items are available in sizes XS-2XL.
TWOTHIRDS
TWOTHIRDS, a brand deeply inspired by the ocean, sees itself as a label for individuals who appreciate the immense value of marine ecosystems and demand style with substance. Based in Europe, the brand manufactures all its products locally, a deliberate strategy to significantly reduce its carbon footprint associated with transportation. Furthermore, TWOTHIRDS conducts thorough audits of its final stage of production, ensuring quality and ethical standards are consistently met. Their commitment to the ocean is reflected in their practices, with clothes available in sizes XS-L.
Organic Basics
Based in Denmark, Organic Basics is a brand dedicated to high-quality, sustainable fashion basics for men and women. Their philosophy centres on "sustainable thinking" in every aspect of their operations. This means meticulously choosing fabrics that minimise environmental harm and partnering exclusively with factories that share their commitment to reduced impact. Their swimwear range is a prime example, made from recycled plastic sourced from oceans and landfills, transforming waste into durable, comfortable garments. Organic Basics’ clothes are available in sizes XS-XL, offering foundational pieces with an ethical backbone.
Bluebuck
Bluebuck is a French menswear label that combines a playful, adventurous spirit with a deep love for nature. Specialising in technical menswear basics and swimwear, the brand designs products built to last, counteracting the fast fashion cycle. Bluebuck prioritises local production to minimise its environmental impacts, ensuring greater oversight of its supply chain. They utilise better materials such as GOTS certified organic cotton and recycled marine plastic in their collections. This dedication to quality, local manufacturing, and sustainable materials is available in sizes XS-2XL.
Kampos
Kampos is a luxurious Italian brand driven by a vision of integrity and conscience for current and future generations. The brand actively aims to raise awareness about critical environmental issues like over-fishing and marine pollution. Kampos offers unique swimwear pieces crafted from recycled plastic bottles, discarded fishing nets, and other lower-impact organic fabrics. This high-end brand demonstrates that luxury and sustainability are not mutually exclusive but can be seamlessly integrated. Most products are available in sizes XS-2XL.
Underprotection
This Danish brand masterfully combines ethics with aesthetics, creating stunning underwear, loungewear, and swimwear. Underprotection exclusively uses lower-impact materials, including organic cotton and recycled synthetics. Their commitment to sustainability extends to their packaging, which is entirely recycled or biodegradable. The brand firmly believes that "fair working conditions and fair wages are human rights" and only partners with certified factories. Underprotection’s mission is to celebrate women of all kinds, making them feel beautiful and comfortable with a clear conscience. The full range is available in sizes XS-XL.
ASKET
Since 2015, ASKET has been redefining wardrobe essentials by focusing on timeless design, revolutionary sizing, and fair pricing. The Swedish brand rejects seasonal collections, instead building a single, permanent collection of essentials. By cutting out middlemen and selling directly to consumers, ASKET maintains full control over its supply chain and pricing, ensuring transparency and accountability. Their swimwear, like all their garments, is designed for longevity and minimal impact. The brand offers an extensive size range from 2XS-2XL, promoting a more considered and sustainable approach to fashion consumption.
Rest of the World
Loop Swim
Founded by two visionary women from the US and India and headquartered in Shanghai, Loop Swim is on a mission to champion circular design and eliminate waste. The brand ingeniously transforms post-consumer plastic bottles into high-performance REPREVE UP50+ sun-protective swimwear for men, women, and children. Loop Swim’s designs are intentionally trendless, focusing on high quality and durability, ensuring that garments retain their shape and colour swim after swim. This commitment to longevity and circularity is available in sizes XS-XL.
The Summer House
Based in India, The Summer House creates beautiful womenswear, including swimwear, using locally made, lower-impact fabrics. The brand is deeply committed to supporting its local community, partnering with local artisans and NGOs to create economic opportunities in the region. Their swimwear collection features elegant prints and flowing silhouettes, reflecting a blend of traditional craftsmanship and contemporary design, all produced with a strong ethical foundation. The range is available in sizes XS-XL.
Koraru
Named after the Japanese pronunciation of "coral," Tokyo-based Koraru is a swimwear brand deeply inspired by circularity principles. The brand uses lower-impact materials in its collections and offers a recycling program, encouraging customers to return old swimwear to close the loop on textile waste. Koraru partially traces its supply chain, demonstrating a commitment to transparency and responsible sourcing. Available in sizes XS-XXL, Koraru offers stylish swimwear that actively contributes to ocean protection and sustainable practices.
Broader Implications and Future Outlook
The trajectory of sustainable swimwear, and indeed the broader sustainable fashion movement, points towards continued growth and innovation. As environmental concerns become increasingly mainstream, and regulatory pressures for corporate responsibility mount, more brands are expected to transition towards eco-friendly materials and ethical manufacturing. The global market for sustainable fashion is projected to expand significantly in the coming years, driven by conscious consumerism and technological advancements in textile recycling and bio-based materials.
However, challenges remain. The cost of sustainable materials and ethical production can sometimes be higher, posing a barrier for price-sensitive consumers. Scaling the production of innovative materials to meet mass market demand also presents logistical and financial hurdles. Furthermore, even recycled synthetic fibres still release microfibres, prompting ongoing research into alternative solutions, such as fabric treatments or innovative washing technologies.
The role of platforms like independent rating systems is crucial in this evolving landscape. By providing transparent and comprehensive assessments of brands’ environmental and social impact, they empower consumers to make informed purchasing decisions, effectively voting with their wallets for a more sustainable future. This consumer-driven demand, coupled with increasing industry accountability and potential policy interventions, is gradually reshaping the fashion industry. The future of swimwear lies not just in aesthetic appeal but in its fundamental connection to the health of our planet’s most vital resource: water.
Conclusion: Making an Informed Choice for a Healthier Planet
The decision to choose sustainable swimwear is a powerful statement of intent—a commitment to protecting our oceans, supporting ethical labour, and fostering a more circular economy. The brands highlighted in this guide represent the vanguard of this movement, demonstrating that it is possible to combine comfort, style, and durability with profound environmental and social responsibility. By investing in these "Good" and "Great" rated options, consumers not only acquire high-quality, timeless pieces but also contribute directly to a healthier planet for generations to come. The era of throwaway fashion is yielding to a new paradigm of conscious consumption, where every purchase has the potential to drive positive change.
