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PROTECT YOUR DNA WITH QUANTUM TECHNOLOGY
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Bikini season is upon us and finding a sustainable summer staple can be quite a challenge. Discover our roundup of the most ethical ‘kinis around.
Sustainable bikinis for all body types
I’m not sure why, but when it comes to swimsuits—particularly bikinis—I tend to pick favourites. This bottom always gets loose in the water, that one doesn’t cover me up enough, this other one squeezes me in all the wrong places… as you can imagine, the list can get quite extensive, and is something most people go through on their quest to find their Goldilocks set. Like lingerie, a bikini doesn’t need to be perfect, but it should make you feel good. From taking a dip in the pool to snorkelling to simply lounging around, a bikini can fulfill many purposes. But along with style and practicality, it is equally important to consider the ethical impacts of our swimwear, which is why we’ve tracked down the best sustainable bikinis for you.
Common sustainability problems in swimwear
For those of us who live in the sun year-round, perhaps we can get carried away (myself included), filling our drawers with the newest statement trend or print. Aside from succumbing to a fast fashion cycle, swimwear also presents another problem when it comes to sustainability: plastic. Synthetic fabrics—like nylon, polyester, and spandex—are perfectly suited for swimwear because they wick moisture and stretch across the body, reducing friction in the water. They are also versatile and inexpensive to make, so the fashion industry relies on them heavily: not just for swimwear, but also activewear, outerwear, and other cheap fast fashion garments. This is a major problem because plastic is not biodegradable, meaning it never decomposes, which is an issue from the production phase to the release of microfibres when washing, all the way to disposal of the garment at the end of its life. Luckily the best way to look after your swimwear—gentle hand washing—is the best way to reduce microfibre releases, too. It also makes the most sense, since swimwear is most often worn for a very short period of time and should rarely require a machine wash.
Lower impact bikini materials
Thankfully, there are alternatives to these polluting plastics most swimwear is made from. More eco-friendly materials such as ECONYL, created by Italian firm Aquafil, use synthetic waste like industrial plastic, waste fabric, and fishing nets from oceans, then recycle and regenerate them into a new nylon yarn that is exactly the same quality as virgin nylon. Even better, other swimwear brands are meeting this need, innovating in their own capacity, and creating their own luxe materials from recycled nylon fibres or other natural alternatives. Quick caveat, however, is to be wary of greenwashing when it comes to this kind of stuff. It’s important to remember that it’s not just materials that matter, but also labour and animal scoring.
So, without further ado, read up on this ultimate guide for the brands that are making the biggest splash in sustainable bikinis.
Underprotection
Underprotection is a Danish brand combining ethics and aesthetics, creating underwear, loungewear, and swimwear from lower-impact materials like organic cotton. All of its packaging, paper, and polybags are either recycled or biodegradable, and it only works with certified factories as it believes “fair working conditions and fair wages are human rights”. Underprotection exists to celebrate women of all kinds, and its goal is to make them feel as beautiful and comfortable as possible.
You can find the full range in XS-XL.
Loop Swim
Coral Deco Loop Bikini Top – Ships internationally from China
Founded by two women from the US and India and headquartered in Shanghai, Loop Swim is a brand on a mission to close the loop on waste and promote circular design. It transforms post-consumer plastic bottles into phenomenal REPREVE UP50+ sun protective swimwear for men, women, and kids. Its trendless, high-quality designs are developed to retain shape and colour swim after swim.
Find most items in sizes XS-XL.
1 People
1 People is a Danish-designed lifestyle and luxury brand. It blends Scandinavian colour palettes and minimalist design to create effortlessly elegant collections for the conscious-minded. Its pieces are thoughtfully crafted by small family-run manufacturers using lower-impact and certified materials.
Find the collection in sizes XS-XL.
Anekdot
Anekdot is a clothing brand that offers more sustainable designer underwear, swimwear, and loungewear handmade in Berlin. They create exquisite intimates upcycling materials from production leftovers, deadstock, and vintage trimmings giving them a new chance to be enjoyed in the process creating limited edition products.
Find most products in sizes XS-XL.
ColieCo
Paloma Wrap Around Bikini Set – Ships internationally from Portugal
ColieCo is a Portuguese lingerie, underwear, and swimwear brand that uses a handmade to order process for creating the most premium pieces. Every single garment is manufactured exclusively using lower-impact and responsibly sourced fabrics.
Find the range in sizes 2XS-3XL.
Natasha Tonic
Destiny, Top – Ships internationally from the US
Swimwear made out of hemp? Yes, please. For decades, swimsuits have been made out of polyester, which is non-biodegradable and bad for the skin. Natasha Tonic’s hemp swimwear fabric is based around a unique, natural hemp fibre that is anti-microbial, UV resistant, durable, and a healthier choice for your skin and our oceans. Even better, each piece is slightly different since it is printed by hand, allowing for each sustainable bikini to be tailored for the most gorgeous you.
Find their collections in sizes XS-L.
Kampos
Kampos is a luxurious Italian brand that believes in creating a world with integrity and conscience now and for future generations. The brand aims to raise awareness of over-fishing and marine pollution and offers consumers unique pieces that are made of recycled plastic bottles, fishing nets, and other lower-impact organic fabrics.
Find most products in sizes XS-2XL.
Finisterre
Born from the needs of hardy British surfers, Finisterre is a pioneering, more sustainable outdoor brand, built to inspire a love of the sea and anchored in exceptional products.
Find most items in Sizes XS-2XL.
BONDI BORN
Versatile and silky, BONDI BORN’s conscious crop is a flared mini cami top that ends just above the waist. It features delicate rouleau shoulder straps that accentuate your chest and can be nicely paired with the brand’s universal wrap skirt. This crop was sustainably made using a premium Bulgarian linen blend. Garments are available in sizes XS-L. Love!
Modibodi
Modibodi is an Australian brand that offers the original period and leak-proof underwear for everyone. Find some products inclusively sized from 3XS-6XL.
NIKIN
If you’re the kind of person who likes to wear their morals, look no further than Swiss brand NIKIN. Not only is a tree planted every time you purchase a NIKIN product, you also get to show your tree pride.
Products are available in sizes XS-2XL.
TWOTHIRDS
TWOTHIRDS sees itself as a brand for people who are awake and aware of the immense value of our oceans, but also have a thirst for style and substance. It manufactures all its products locally to reduce its carbon footprint, as well as audits all of its final stage of production.
The clothes can be found in sizes XS-L.
Spell
Spell is an Australian fashion brand inspired by far-off places, vintage treasures, and childhood memories. Its clothes are proudly designed and sampled in Byron Bay, and produced responsibly in factories around the world.
Most garments are available in sizes 2XS-2XL.
Afends
PASCALE – Ships internationally from Australia
Born in Byron Bay, Australia, Afends is a more responsible brand leading the way in hemp fashion. Drawing inspiration from the environment, streetwear, and surf culture, Afends’ mission is to create more sustainable clothing through innovation, action, and positive change. As true hemp advocates, it purchased 100 acres of farmland called Sleepy Hollow to grow its own hemp crops and ignite the hemp revolution.
Find most of the range in sizes XS-XL.
CASAGiN
Italian brand CASAGiN designs apparel for those looking to foster a more sustainable and conscious lifestyle in their closet and beyond.
Find most items in sizes XS-2XL.
Koraru
Koraru is named after the Japanese pronunciation of the English word ‘coral’. Based in Tokyo, it creates swimwear inspired by circularity principles and uses lower-impact materials, as well as offering a recycling program and partially tracing its supply chain.
Available in sizes XS-XXL
Editor's note
Feature image via Finisterre, all other images via brands mentioned. Good On You publishes the world’s most comprehensive ratings of fashion and beauty brands’ impact on people, the planet, and animals. Use our directory to search thousands of rated brands.
We updated this article on 15 April 2026. Our editors frequently make updates to articles to ensure they’re up to date. We refreshed our selection of brands to ensure we’ve included brands with recent ratings.
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