10 Sustainable Sweatpants That Meet the Highest Ethical Standards

Sustainability is fashionable, and as fashion companies strive to take advantage of the sustainability market, the range of ethical clothing has never been greater.

Whether it’s vegan-friendly, fair trade, or organic cotton you’re looking for, there are now brands that offer you guilt-free, sustainable sweatpants that align with your worldview. 

Take a look at these ten ethical sweatpants suppliers to help you choose the one for you. 

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1. Outerknown

Outerknown’s sweatpants are available in men’s and women’s fits. Outerknown’s comfiest sweatpants yet, they’re just as good wearing out as wearing at home.

Outerknown’s focus is people and planet. As such, these comfortable, tapered-leg sweats are made in ethical factories from organic and recycled materials. Recycled polyester turns waste into a valuable material, reducing CO2 emissions in the process.

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2. Pact

Available in mens and womens styles, these sweatpants are a medium weight option, made of a cozy loop-back Terry fabric that’s perfect for cool-ish nights. These pants have two front pockets for all your essentials.

Made in a Fair Trade factory in India, Pact aims to make Sustainable Fashion for All. Pact uses GOTS certified organic cotton meaning no toxic chemicals and 81% less water used than conventional cotton. In fact, these sweatpants save between 70-90 gallons of water, depending on the fit. 

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3. ASKET

ASKET makes one sweatpant. That’s it. No seasonal drops, no trend cycles — just a single, permanently available style refined over time and built to last. Cut from a 380gsm unbrushed organic cotton loopback and milled, cut, and sewn entirely in Portugal, these are the kind of sweatpants you buy once and keep for years.

What sets ASKET apart is radical transparency: they publish the full cost breakdown, CO2 emissions, water usage, and energy consumption for every garment — right on the product page. At $180 they’re the investment option on this list, but that price reflects what ethical manufacturing in Europe actually costs. They also take back any unwanted ASKET garments for resale, closing the loop on the product’s life.

Note: currently available in men’s sizing only.

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4. KNOWN SUPPLY

Known Supply’s Unisex Sweatpants are exactly what they sound like: no fuss, no greenwashing, just well-made organic cotton fleece pants you’ll actually want to live in. Fair Trade certified and GOTS certified throughout, they’re made in a factory where the people who sewed your sweatpants are paid fairly and treated with dignity — and Known Supply even lets you meet the makers on their website.

At $56, they’re also the most accessible certified option on this list. Available in black and white, XS through 4XL.

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5. Kotn

The essential sweatpants by Kotn come in mens and womens fits. A subtle throwback to the early 2000s, these sweatpants are comfy with an elastic waistband and soft brushed interior. The best part? They get softer with every wash.

Kotn is a certified B Corporation working to change fashion by serving you the “farm to table” experience for your closet. They do this by responsibly sourcing their cotton from Egypt, where they pay fair prices, and ethically making the sweatpants in Portugal where they guarantee a living wage.

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6. Patagonia

Patagonia has been leading the charge when it comes to sustainable fashion and they’re not about to stop now. In terms of transparency, sustainability, and fair labor they are top-rated in every category, and these 100% recycled sweatpants are a great example of why. 

These ethical sweatpants, which come in men’s and women’s sizes, are made from recycled fabric scraps and plastic bottles, and there is a clothing exchange available for credit, as a way of closing the loop. Patagonia also displays the name and location of the factory that makes the garment from the item page.

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7. Tentree

Available in men’s and women’s styles. Tentree plants ten trees with every purchase. These joggers are sustainably made to save 363 liters of water and 1.16 kg of CO2.

Tentree’s code of conduct helps ensure their manufacturing in China is ethical and fair. Tentree’s goal with their tree planting project is to plant 1 billions trees by 2030.

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8. MATE the Label

MATE the Label comfortable joggers come in women’s and men’s fits. Don’t take our word for it though, the reviews speak for themselves. The brand also shares the cost per wear with you right on the product page!

These pants aren’t made with any environmentally-harmful chemicals and come from a B Corp and Carbon Neutral Certified brand. MATE the Label excels in transparency and sources mostly locally, within a 17 mile radius of their headquarters in LA.

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9. Happy Earth 

Happy Earth’s Forest Joggers are ultra-soft fleece sweatpants made in a Fair Trade certified factory in India using organic cotton grown, harvested, and dyed with certified non-toxic dyes. The factory runs on 60-70% solar power, water usage during production is fully recycled, and all shipping emissions are carbon offset.

What makes Happy Earth genuinely different is the give-back model: every purchase lets you choose your impact — plant trees, clean up plastic, or fight climate change. Relaxed and all-gender with deep pockets, these are sweatpants you can feel as good about wearing as you do buying.

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10. ZONE by Lydia

Zone by Lydia, founded by Olympic gold medalist Lydia Lassila, offers sustainable activewear that combines performance with environmental responsibility. Their Women’s Wide Leg Jogger is crafted from a blend of 55% hemp and 45% organic cotton terry, providing a breathable, warm, and durable fabric that naturally softens over time. Designed for all-day comfort, these joggers feature a relaxed wide leg, deep side pockets, and ribbed trims for a clean finish.

The brand emphasizes ethical production, with garments certified OEKO-TEX and GOTS throughout. Zone by Lydia is also a member of 1% for the Planet, donating a portion of its sales to environmental causes. Their commitment to sustainability extends to plastic-free packaging and the use of low-impact dyes, ensuring that each piece is as kind to the planet as it is to your skin.

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We hope you found some ethical sweatpants!

There are a bunch of ways to be ethical in fashion, and some are easier than others. Some ways also matter more to you than others, and some companies will use high-profile but relatively meaningless ethical gestures to jump on the bandwagon and distract customers from shady and destructive practices.

As customers become more aware of the impact of the fashion industry on the environment and on the lives of those involved in manufacturing, it’s important for companies to fall in line and be held to a higher standard. Hopefully, this list of ethical sweatpants will give you some good leads into the world of sustainable fashion and help you make more informed fashion choices.

Editor’s Note (May 2026): This article has been updated with fresh brand recommendations and verified links throughout. We’ve replaced several options that are no longer available and added new certified brands — including Known Supply, ASKET, and ZONE by Lydia — to better reflect today’s best sustainable sweatpants.