Here are the best ethical fashion brands making underwear with sustainable materials. Most of the brands are from Canada or the US, but there are a few international ones. I've included info on which country they ship from and their shipping policies whenever possible so you can better determine whether you need to pay duties. I've also noted which brands make underwear for men and children.
Boody makes comfortable underwear and everyday basics for men, women, and babies. Using bamboo viscose, the clothes are produced ethically in China, Vietnam, and India. I've found their products in health food stores in Toronto, and they are stocked in retail stores around the world. They also ship to select countries from shipping centers within that country. For example, Canadian orders will ship from Canada.
Canadian B Corp KOTN has a new line of comfy cotton underwear—bralettes, bandeau-style bras, panties—ethically made in Egypt with Egyptian cotton. They have free international shipping for orders over $150.
WAMA Underwear makes comfortable hemp underwear for men and women. Hemp is natural, organic, and sustainable, but it gets a bad rap for being a rough and scratchy fabric. WAMA gifted me a set to try—the green racerback bralette and high-waisted underwear—and I was pleasantly surprised by how soft they were. I love the colour and wear this set all the time. While cotton is still softer, hemp is a sturdy fabric that's naturally anti-bacterial with anti-odour properties. It's breathable and should get softer with every wash. WAMA is US-based and ships internationally.
Canadian B Corp clothing brand tentree now makes sustainable underwear for men and women. They are designed in Canada and made ethically in Turkey from Tencel x Refibra and organic cotton. With every purchase, tentree plants trees on your behalf.
Sustainable brand PACT's organic cotton clothing is made in Fair Trade factories. They make clothes, which include underwear, for men, women, kids, and babies. PACT is based in the US and ships internationally, but I've found PACT underwear in my local Whole Foods.
Canadian B Corp clothing brand Frank and Oak have added a line of comfortable underwear for men and women to their collection. 75% of their products are made with sustainable processes and eco-friendly materials. Their underwear is made from organic cotton. They ship to Canada, the US, and many other countries.
Allbirds are known for their sustainable sneakers, and they've branched out to clothing and accessories for both men and women. Their underwear is made with TENCEL Lyocell and Merino Wool. Allbirds ships to select countries (including Canada) and has retail stores in the US and around the world.
Cosabella is a family-owned line of luxury lingerie that's made in Italy from start to finish. Using the highest quality materials, a single Cosabella thong can take up to 10 hours to make. They ship from the US and can also be found in department stores such as Neiman Marcus and Saks Fifth Avenue.
UK-based Thought Clothing makes easy-to-wear clothes that are sustainable and contemporary. They use fabrics and processes that are kind to the planet and to people. Their underwear for women and men is made from bamboo cotton, viscose, or organic cotton jersey.
Designed in Toronto and ethically made in Montreal, Mary Young makes comfortable lingerie and intimates. Some of their collection is made from rayon from bamboo. Their sizes are up to 2XL. They ship from Canada internationally. MadeTrade, a US-based online retailer of ethical and sustainable goods, also carries this line.
Organic Basic's sustainable underwear line is ethically made in Europe. They are a B Corp. Materials used are TENCEL, organic cotton, and recycled polyester. They ship from Denmark worldwide.
Direct-to-consumer swimwear brand Summersalt has branched out to clothing and accessories. Their intimates collection is made from recycled nylon and bamboo.
Knickey's ethical, elevated, and earth-friendly intimates are made from organic cotton that is sustainably grown and spun in India. They ship from NYC internationally.
Fair Trade fashion pioneer People Tree's super comfy sustainable underwear line is made from GOTS certified organic cotton. They ship from the UK around the world.
MeUndies makes colourful underwear for men and women with fun prints. You can even get matching underwear with your significant other. They're made from sustainable materials such as ethically-sourced organic cotton or MicroModal. MeUndies ship from the US internationally. Canada, Australia, and New Zealand orders are not subject to duties and taxes.
Miakoda's inclusive bras and underwear are made from sustainable plant fibres such as bamboo, soy, and organic cotton. A small business, their pieces are made in New York. Their leftover fabric scraps are made into zero waste accessories. Miakoda ships from the US internationally.
Naja makes eco-conscious lingerie. Instead of being dyed, they are digitally printed so the water waste is next to none. They are incorporating more recycled plastic into their collections. Their garment factories mostly employ single mothers or female heads of households who are paid above market wages with healthcare benefits. They ship from the US and ship internationally.
Cut and sewn in the USA, Brook There's sustainable lingerie is lightweight and buttery soft. Their core fabric is organic cotton made from GOTS-certified yarn, milled and dyed in California. They ship free within the US and to Canada and other countries with a fee.
Proclaim's inclusive nude underwear line is made ethically in Los Angeles with sustainable fabrics such as TENCEL and recycled polyester. They ship internationally from the US. Reformation also stocks Proclaim underwear.
The Very Good Bra uses sustainable, 100% botanically-sourced materials such as organic cotton and TENCEL. leaving no negative environmental impact at end of life. They also avoid spandex, polyester or nylon, even in their sewing thread, elastic and labelling. Orders are shipped from Australia.
87% of Patagonia's sustainable underwear for men and women uses recycled materials. They are Fair Trade Certified sewn. They pledge 1% of sales to the preservation and restoration of the natural environment. Patagonia has retail shops around the world.
Vancouver-based lingerie line Understance places an emphasis on good fit. Their products are made ethically abroad, and their factories produce 50% less wastewater than other manufacturers. They ship from their BC warehouse to Canada and US only.
A certified B Corp, Saalt is a company that promotes reusable period care. In addition to their line of thin and comfortable leakproof underwear, they also have reusable period cups. They ship from the US internationally, but they're currently unable to ship to Canada, Brazil, or Japan.
Minimalist clothing brand Baserange places an emphasis on clean lines and easy silhouettes. Their underwear line is no different. They work closely with producers to source and develop quality textiles from both natural fibres and recycled content. and use sustainable fabrics such as organic cotton and modal. Baserange ships from France and their prices include all tax, VAT, and duties.