Best organic cotton bra brands
Updated November 7, 2026
Most bras are nylon and spandex. Cotton bras and bralettes breathe better for everyday wear and sleep.
Expect 5 to 10% elastane for fit. Look for organic cotton, a cotton layer against the skin, and wire-free styles if comfort comes first.
The 20 brands below sell cotton bras and bralettes and are listed in The Plain Thread directory. The green links go straight to their matching shop pages. Some of these brands also sell blends, so check the fiber content on each product.
High-end Danish basics in organic cotton, wool, wild silk, linen, and hemp — full natural fiber range.
Women's activewear and basics in certified organic cotton.
Women's lingerie and basics made from organic cotton and silk.
100% organic cotton, spandex-free basics and underwear designed for sensitive skin.
Organic cotton underwear, basics, and lingerie for men and women, made under fair conditions in Europe.
Compostable organic Supima cotton underwear and basics with minimal packaging.
Women's organic Pima cotton underwear and loungewear in inclusive sizing.
Women's dresses and separates made from regenerative cotton grown on partner farms.
Canadian women's organic cotton underwear and basics.
Australian women's clothing in organic cotton with natural plant dyes.
100% organic cotton basics and naturally dyed clothing made in small batches worldwide.
Dutch activewear in hemp, organic cotton, and TENCEL for men and women.
Hemp and organic cotton basics and streetwear made with a focus on regenerative agriculture.
Romantic women's clothing made from organic cotton and other sustainable fibers, produced in Germany and Portugal.
Los Angeles brand making organic cotton and TENCEL basics and activewear for women, men, and kids.
Curated basics in hemp, organic cotton, and linen sourced from responsible producers.
Affordable UK women's clothing in natural and lower-impact fibers.
Danish organic cotton underwear and basics for men and women.
Common questions
Can a bra be 100% cotton?
Rarely. Elastic bands and some stretch are needed for support.
Do cotton bras give support?
Bralettes give light support. For larger cup sizes, look for a firm underband and wider straps.
How do I wash a cotton bra?
Hand wash, or use a mesh bag on a gentle cycle, and hang it to dry to protect the elastic.