8 Best Swimwear Brands for Sustainability

Sustainable swimwear brands combine style, quality, and sustainable practices. Each brand offers a unique approach to sustainable swimwear, from using recycled materials to implementing circular business models.

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Discover our curated selection of sustainable swimwear brands. These seven brands offer everything you need for your next pool day — from bikinis and one-pieces to bodysuits.

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Organic Basics

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Trunks, bikinis, and one-pieces | Starts at $44

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Organic Basics offers a versatile swimwear collection featuring shorts for men and both bikinis and one-pieces for women. Most of its swimwear collection is made from a blend of recycled nylon and elastane, creating durable pieces that maintain their shape through frequent use. The brand tracks the environmental impact of each product through Life Cycle Assessments and recommends using a GUPPYFRIEND Washing Bag to prevent microfiber pollution from the synthetic fibers in its clothes. It partners with factories that prioritize fair labor practices and safe working conditions, ensuring that all their pieces are ethically made.

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Dedicated

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Trunks, bikinis, and one-pieces | Starts at $45

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Dedicated offers a comprehensive swimwear collection crafted from 100% recycled PET bottles, featuring both women's and men's styles. For women, the collection includes a bikini top and a thoughtfully designed wrap swimsuit with flattering details like waist gathers, double-layer fabric, adjustable straps, and removable padding. Men's swim shorts come with practical features including mesh lining, multiple pockets, and an elastic drawstring waist. All products are made with GRS-certified fabric, and the brand shares each product's journey from recycling to retail. Dedicated maintains ethical production standards with a supplier code of conduct and a Fairtrade license.

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Reformation

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Bikinis and one-pieces | Starts at $75

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Reformation’s swimwear line combines style with sustainability, using innovative materials like EVO, a biobased polyamide made from renewable plants, and recycled nylon. This blend creates swimwear that's not only fully plastic-free but also stretchy and comfortable. Reformation is Climate Neutral certified and embraces circular fashion through its RefRecyclable program.

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REI

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Trunks, bikinis, and one-pieces | Starts at $30

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REI's marketplace features swimwear made from sustainable materials like recycled polyester and upcycled coconut. The company provides both resale and repair services for garments and has offset 100% of its operational emissions for over a decade. Note that not all swimwear on the site uses sustainable materials — you'll need to check the materials section on each product page carefully before purchasing.

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Patagonia

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Trunks, bikinis, and one-pieces | ‍Starts at $40

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Patagonia offers the most extensive sustainable swimwear collection among these brands. Its range includes everything from one-piece and two-piece swimsuits to board shorts and coverups, all made with recycled nylon and spandex blends in Fair Trade Certified™ factories. The brand provides a resale program, repair services, and a lifetime warranty to extend product lifespans and prevent waste.

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Wolven

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Bikinis and one-pieces | Starts at $42

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Wolven makes sustainable swimwear products from recycled bottles. What sets Wolven apart is its circular resale program, allowing customers to participate in a buy-sell-trade system for pre-loved items. The brand also actively engages in climate advocacy through its "Trash Talk" educational series and holds the Climate Neutral and 1% for the Planet certificates.

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Outerknown

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Trunks and one-pieces | Starts at $128

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Known for its laid-back, surf culture-inspired apparel, Outerknown brings this same spirit to its swimming trunks. The trunks are made from 100% post-consumer waste such as plastic water bottles, industrial fishing nets, and used clothing. After use, customers can send their trunks back to Outerknown for resale. The brand uses plastic-free packaging and incorporates renewable energy in its production.

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Asket

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Trunks | Starts at $110

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Asket has partnered with a Portuguese mill specializing in swimwear to develop fabric from Seaqual™—a yarn made from ocean plastics and waste collected by fishermen, nonprofits, and volunteers along the French and Spanish coasts. Using this fabric, Asket creates the Swim Shorts, which are fast-drying, colorfast, and moisture-wicking. The brand extends product lifespans through its repair service, and customers can return irreparable or unwanted garments to the brand for reselling or recycling.

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