Organic, sustainable plus-size underwear was once hard to find, but that’s changing. In recent years more brands have started offering comfortable, flattering plus-size styles made from natural, eco-friendly fabrics such as organic cotton, hemp, and TENCEL. Below is a curated list of trustworthy brands that prioritize quality, ethical production, and non-toxic materials.
What this guide includes:
- Where to Find Natural, Organic, & Eco-Friendly Plus-Size Underwear
- Subset
- Q for Quinn
- Oddobody
- Proclaim
- Pact
- Object Apparel
- WAMA
- La Coochie
- Tomboyx
- Even More Brands for Non-Toxic Plus-Sized Undies
- Healthy Underwear Means Natural Fabrics & Non-Toxic Dyes
This guide includes product recommendations; we may receive compensation for purchases through some links. Recommendations are chosen with care.
Where to Find Natural, Organic, & Eco-Friendly Plus-Size Underwear
Each brand listed below carries size-inclusive underwear that goes at least up to 3XL. These brands were selected for fabric quality, sustainable practices, and ethical manufacturing. Here are top options for organic and eco-friendly plus-size underwear.
Subset
Subset (previously Knickey) makes Fair Trade plus-size underwear from GOTS- and OEKO-TEX-certified organic cotton blended with a small percentage of elastane for stretch. Their briefs, thongs, hipsters, and bralettes are dyed with non-toxic, eco-friendly colorants. These styles are comfortable and durable for everyday wear—from exercise to errands.
Sizes: 2XS–4XL
Q for Quinn
Q for Quinn offers underwear and bralettes made from 100% GOTS organic cotton with a small elastane blend for comfort and fit. The brand emphasizes high-quality construction and comfort, and they offer a first-pair guarantee so you can try items risk-free. They also donate a school meal for every purchase.
Sizes: XS–3XL
Oddobody
Oddobody produces underwear in Fair Trade Certified factories using 100% GOTS organic cotton. They offer multiple styles—briefs, high-waisted, string bikini, french cut, and thongs—plus loungewear like sleep sets and tanks.
Sizes: XS–3XL
Proclaim
Proclaim offers underwear made from organic cotton blended with hemp and also TENCEL options, both of which have a soft, comfortable feel. Many styles include a bit of spandex for stretch. The brand focuses on local, ethical manufacturing, reducing waste and water use, and offering inclusive sizing and skin-tone options.
Sizes: S–3X
Pact
Pact is known for offering organic cotton underwear at more affordable prices. Most items are GOTS and Fair Trade certified, and the brand provides a wide selection of styles and colors.
Sizes: XXS–3XL
Use code THEFILTERY15 for 15% off full-priced items.
Object Apparel
Object Apparel hand-makes eco-friendly underwear to order in Detroit from organic cotton dyed with non-toxic, water-based inks. They offer plus-size panties, briefs, boxer briefs, and bralettes in solid and printed options.
Sizes: XS–3XL
WAMA
WAMA specializes in hemp-blend underwear. Their plus-size pieces, bralettes, and boxer briefs combine sustainable hemp with organic cotton and a touch of spandex. WAMA manufactures in a WRAP-certified facility, and hemp’s natural antimicrobial properties and low pesticide needs make it a strong choice for undergarments.
Sizes: XS–4XL
Our link gets you 15% off.
La Coochie
La Coochie offers bralettes and underwear primarily made from GOTS organic cotton. Many styles include about 5% elastane for stretch; some styles incorporate more synthetic fibers like nylon or elastane for mesh or lace panels. If you want minimal synthetics, choose the solid, mesh-free options.
Sizes: 2XS–3XL
Tomboyx
Tomboyx is an honorable mention for size range and inclusive fits. While most of their lines are not organic, they offer a small organic collection and use OEKO-TEX-certified cotton in many pieces. They also produce TENCEL styles, which are plant-based and manufactured in a closed-loop process that reduces chemical release. Their sizing runs very wide—typically 3XS to 6XL—and their style range covers briefs, thongs, and long boxer briefs.
Even More Brands for Non-Toxic Plus-Sized Undies
If you want additional options, consider these brands that also offer organic or mostly-organic styles in inclusive sizes:
- Duluth: “Free Range” collection is 94% organic cotton + 6% spandex. Sizes XS–3X.
- Eco Intimates (Australia): Majority GOTS organic cotton with non-toxic dyes. Sizes 8–20.
- Le Buns (Australia): Typically 90% organic cotton + 10% spandex. Sizes 6–20.
- Pansy: Made in the USA from domestically grown organic cotton blended with recycled spandex. Sizes S–5XL.
- ThirdLove: Mostly synthetic fabrics overall, but they have an organic cotton collection that includes briefs, thongs, and bralettes. Sizes XS–3X.
- Thunderpants: Made in the USA, typically 90% organic cotton + 10% spandex. Sizes S–4XL.
Healthy Underwear Means Natural Fabrics & Non-Toxic Dyes
Choosing natural, organic fabrics and non-toxic dyes matters for comfort and health. Natural fibers like cotton, hemp, and TENCEL are more breathable than many synthetics, which helps keep the genital area drier and reduces the risk of bacterial overgrowth and yeast infections.
Some synthetic textiles and chemical finishes can contain substances that may be harmful with prolonged skin contact. Organic cotton avoids toxic pesticides and herbicides used in conventional cotton farming, so it’s a healthier option. Look for third-party certifications such as GOTS and OEKO-TEX to ensure fabrics were processed and tested for harmful chemicals.
Also be cautious with garments labeled “wrinkle-free” or similar finishes—those often indicate chemical treatments. Choosing certified organic and responsibly manufactured underwear reduces exposure to potentially harmful chemicals and supports more sustainable textile practices.
P.S. If you’re refreshing your underwear drawer, you may also find these related guides helpful: organic cotton underwear made in the USA, hemp underwear brands, best TENCEL underwear, organic cotton thongs, maternity and nursing options, and organic bras and boxers for men.
Choosing natural, organic, eco-friendly, and size-inclusive underwear supports both personal health and the planet’s future.
If I missed your favorite organic plus-size underwear brand, let me know in the comments and I’ll consider adding it to the list!