10 Dec

The Ultimate Guide to Ethical and Sustainable Swimwear

If you’re ready to give an ethical and sustainable overhaul to your swimwear drawer, we’ve got you (partially) covered with eco swimmer brands from around the world.

Swimwear is one of those basics that needs to check a few boxes. It needs to be comfortable, look great, and not get warped after a couple of wears and washes. While it can be tempting to grab a few new trendy bikini sets or a couple of flashy one pieces every year as the warm weather rolls around, there is something to be said for supporting the best sustainable swimwear brands that create timeless, flattering, and ethically made pieces that will take you from the pool to the beach and back again.

The fabric situation for swimwear

Unfortunately, swimwear is usually made with harmful synthetic fabrics like nylon, polyester, and spandex. While they are good choices in terms of practicality, they are also bad news for the planet as plastic-based materials. Then there is the issue of microfibre release when washing, which you can read more about in our helpful guide. Hint: handwashing is a go.

Luckily, these sustainable swimwear brands are stepping up and incorporating more eco-friendly materials such as ECONYL, hemp, and recycled nylon into their collections.

Read on to discover the best sustainable swimwear brands we’ve found from around the world.

USA + Canada

Natasha Tonic

Rated: Good
red and white striped eco-friendly bikini by Natasha Tonic

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 antimicrobial, UV resistant, durable, and a healthier choice for your skin and our oceans. Even better, each piece is slightly different since they're printed by hand, allowing for each sustainable bikini to be tailored for the most gorgeous you! Find sizes XS-XL.

See the rating.

Shop Natasha Tonic.

Vitamin A

Rated: Good
woman smiling on sand wearing sustainable swimwear by Vitamin A

Made locally in California, Vitamin A’s collections of swimwear and loungewear use a high proportion of eco-friendly materials, including recycled nylon. The brand also uses a waterless process to print its designs with, reducing its chemical and water usage. Find the pieces in sizes XS-XL.

See the rating.

Shop Vitamin A.

Shop Vitamin A @ Curate.


Rated: Good
two images of person in bikini by September

SEPTEMBER was created by passionate surfer and designer, Erika Seiko Togashi, who noticed the lack of timeless, elegant and sustainable surf and swimwear in the industry. Founded on modernist design principles, pieces are made using luxury Italian recycled fabrics in a small, female owned factory in Bali, delivering high performing, timeless classics made fairly.

See the rating.


Shop SEPTEMBER @ Urbankissed.


Rated: Good

Patagonia is a brand that truly lives and breathes the great outdoors. It makes clothing for trail running, climbing, mountain biking, surfing, skiing, and snowboarding. Patagonia has strong labour rights and uses recycled, rather than virgin, polyester. It has also committed to reducing its energy use and emissions, and stocks sizes XS-3XL.

See the rating.

Shop Patagonia @ LVR Sustainable.

Shop Patagonia Pre-Owned @ Vestiaire Collective.

Shop Patagonia Kids Pre-Owned @ Retykle.

Shop Patagonia.


Rated: Good
Modern white ethical bikini top by LONDRE

LONDRĖ is a Canadian minimalist sustainable swimwear brand making pieces from recycled plastic bottles. So far, LONDRĖ has recycled 90,000 plastic bottles from the streets and beaches of Taiwan! Looking to create the smallest impact possible, all water used in the brand’s process is able to be reused and recycled. The brand is also creating positive change in our global community, using the business to raise awareness and funds for women's health and environmental initiatives, donating over $10,000 to organizations such as Amazon Watch and the Yellow Hammer Fund. Swoon!

See the rating.


Mara Hoffman

Rated: Good

With a focus on mindful and conscious practices, Mara Hoffman uses eco-friendly materials including GOTS certified cotton, recycled nylon, and recycled polyester, and even has a range of Oeko-Tex STeP certified products. Items come in sizes XS to 3XL, and the brand also has a gorgeous extended sizes collection, so you can be sure to find a new wardrobe addition no matter the bod you rock.

See the rating.

Shop Mara Hoffman @ Reve en Vert.

Shop Mara Hoffman @ Farfetch.

Shop Mara Hoffman Pre-Owned @ Vestiaire Collective.

Shop Mara Hoffman.


Rated: Good
kelly slater wearing outerknown trunks

Founded by surf champion Kelly Slater, Outerknown is a sustainable brand that aims to blend style and function with the protection of natural resources. The brand is Bluesign certified and has partnered with the Fair Labour Association. Find the range in sizes XS-2XL.

See the rating.

Shop Outerknown.

Shop Outerknown @ Wearwell.

Australia + New Zealand

Elle Evans

Rated: Great

Founded in 2013, Elle Evans Swimwear creates beautiful, sustainable, swimwear and activewear for people who care about fashion and the future. The brand uses post-consumer waste fabrics and traces all of its supply chain. The range is stocked in sizes XS-3XL.

See the rating.

Shop Elle Evans.


Rated: Good

Spell is an Australian modern-bohemian fashion brand inspired by far-off places, vintage treasures, and childhood memories. Proudly designed and sampled in Byron Bay, and produced ethically in factories around the world. Most garments are available in sizes 2XS-2XL.

See the rating.

Shop Spell.


Rated: Good
BAYTHE clay active sustainable bikini bra top

BAYTHE is a premium swimwear-meets-activewear label designed in Bondi Beach, providing women of all shapes and sizes the confidence, comfort and understated sexiness they've always wanted in a swimsuit. This active bikini crop is an easy summer staple made to be multi-functional and move with you throughout your day. Despite being designed without wires, this bra top still provides full bust support and is quick-drying, so you can wear it as a bra for yoga, pilates, barre and walking!

See the rating.


Salt Gypsy

Rated: Good

Salt Gypsy is a women’s surfwear brand from Byron Bay—the spiritual home of Australia’s eco-conscious surfing community. These gorgeous, sun-smart designs are all made from 100% recycled nylon, helping to reduce plastic waste in our precious oceans.

See the rating.

Shop Salt Gypsy.

Europe + the UK


Rated: Good
two images of woman in red paloma bikini set

Recognised for their uniquely fun, simple and striking designs is as important to ColieCo as their commitments to the environment. ColieCo was born with a vow to prove that ethical and sustainable underwear could still be fun, adventurous and affordable. They create ethically made, sustainable lingerie, underwear and swimwear in an in-house studio in Portugal, exclusively from sustainable and sustainably-sourced fabrics. Find your new set in sizes XS to XL.

See the rating.

Shop ColieCo.


Rated: Good
closer back view and front view of person in white filled bikini top and thong by Softandwet

Founded in 2019, Softandwet is an Italian label specialising in underwear and swimwear that perfectly blends comfort and simplicity with the luxurious. Committed to minimising its impact, its pieces are produced locally by a female-led, fairworking artisanal lab using the finest Italian fabrics. It operates on small production runs using eco-friendly materials to create soft, seductive lines that celebrate the female form. Find the collection in sizes XS-XL.

See the rating.

Shop Softandwet.


Rated: Good

If you’re the kind of person who likes to wear their morals, look no further. 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-XL.

See the rating.



Rated: Good
two images of person in merlot/lin bikini from Anekdot

Anekdot is a clothing brand that offers 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.

See the rating.

Shop Anekdot.

Organic Basics

Rated: Great
woman of colour wearing ochre recycled plastic bikini

Organic Basics offers high-quality sustainable fashion basics for men and women in organic materials. The Denmark-based brand puts sustainable thinking at the centre of everything—it only chooses fabrics that care for our environment, and only ever partners with factories that care about their impact. The newly-launched swimwear range is made from recycled plastic from oceans and landfills, like in this cute Re-Swim bikini top! Organic Basics clothes are available in sizes XS-XL.

See the rating.

Shop Organic Basics @ Rêve en Vert.

Shop Organic Basics @ thegreenlabels.

Shop Organic Basics.


Rated: Good

Barcelona based allSisters is a sexy, sustainable swimwear brand that cares about the earth. The brand uses the highest quality recycled fabrics to create high-end swimsuits and raises money for biodiversity protection non-profit Surfers Against Sewage, tackling plastic pollution. Rock these thoughtful, innovative ethical beachwear designs with pride and prepare to ride the wave of compliments headed your way!

See the rating.

Shop allSisters.

The Nude Label

Rated: Good

The Nude Label curates comfy vegan underwear, swimwear, and sandals that feel as good as they look. All the pieces are made in a family-run factory in Valencia, Spain. The closeness to the studio allows the Nude Label to have a bigger control over the process and ensure good working practices. Most products are available in XS-XL.

See the rating.

Shop The Nude Label.

Stay Wild

Rated: Good
Light blue simple sustainable bikini by Stay Wild

If you’re looking to add to your capsule wardrobe, you’ve come to the right place. Stay Wild is a London-based swim brand founded by Natalie Glaze and Zanna Van Dijk. Designed to be flattering, feminine, and functional, the brand’s capsule collection features a sports luxe style with a thick strapped bikini top and a high waist bottom for a firm fit and feel. The slightly cheeky cut means you get all the coverage with plenty of confidence!

See the rating.

Shop Stay Wild.

la fille d’O

Rated: Good

la fille d’O (which translates to “the daughter of O”) is the voice of a generation. In 2003, designer Murielle Scherre created this lingerie brand with the vision of being a role model. The brand produces long-lasting products, adhering to the principles of slow fashion. It manufactures locally and also uses low-impact non-toxic dyes. The brand is gender and size-inclusive, with a size range of XS-10XL for every body.

See the rating.

Shop la fille d'O.


Rated: Good

Seahorse Swimshorts – Ships internationally from Italy

Kampos is an Italian luxury 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 sustainable and organic fabrics. Find most products in sizes XS to 2XL.

See the rating.

Shop Kampos.

Conscious Swimwear

Rated: Good
white spotted sustainable bikini by Conscious Swimwear brand

All the trends and no nasties. Every Conscious Swimwear piece is cut and sewn by hand in the brand’s Lisbon atelier. As such, all of its models are limited due to fabric availability. Shipped in sustainable packaging and made of 78% recycled plastic from ocean waste, Conscious Swimwear is raising the bar in sustainable swimwear.

See the rating.

Shop Conscious Swimwear.


Rated: Good
Purple sustainable bikini set by Bower

Launched in early 2015, Bower is a sustainable swimwear and resort wear brand. Bower aims to create design-led swimwear with a focus on the now with a nod to the past. The designs utilise luxury Italian fabrics, partnered with complex construction and considered details. With components sourced from Italy and France, the final product is constructed at a small, specialised factory in Italy. Along with the brand’s commitment to the Earth, Bower has dedicated 1% of all orders to be donated to the Healthy Seas initiative. Find sizes XS-XL.

See the rating.

Shop Bower @ SlowCo.

Shop Bower.


Rated: Good

Born from the needs of hardy British surfers, Finisterre is a pioneering, sustainable outdoor brand, built to inspire a love of the sea and anchored in exceptional products.

See the rating.

Shop Finisterre.


Rated: Good


Underprotection – Site-wide

Combining ethics with aesthetics, this Danish brand makes glamorous lingerie, swimwear, and loungewear you'll love. Get 1 pair of free tights with orders of €100+. (Ends: 30 SEP)

Shop now

Underprotection is a Danish brand combining ethics and aesthetics, creating underwear, loungewear, and swimwear from sustainable materials like recycled polyester and 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.

See the rating.

Shop Underprotection.

Shop Underprotection @ Curate.

Shop Underprotection @ LVR Sustainable.


Rated: Good

The Swim Shorts – Ships internationally from Sweden

ASKET has been creating timeless wardrobe essentials since 2015 with revolutionary sizing and fair pricing. The brand disregards seasonal collections, cuts out all the middlemen, and only sells directly to you—putting its entire focus on building a single permanent collection. Find the range in sizes XS-XL.

See the rating.


Rest of the world

Loop Swim

Rated: Great
two girls playing in water wearing colourful sustainable swimwear by Loop Swim

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.

See the rating.

Shop Loop Swim.

Looking for more swimwear inspiration? Have a look at our favourite sustainable bikinis.

Editor's note

Feature image via Mara Hoffman, all other images via brands mentioned. Good On You publishes the world’s most comprehensive ratings of fashion brands’ impact on people, the planet, and animals. We love to recommend some of the best sustainable brands, rated "Good" or "Great". We also encourage shopping pre-owned as another great way to reduce the impact of our fashion choices. Use our directory to search thousands of rated brands. We may earn a commission on sales with top-rated partners made using our offer codes or affiliate links.

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