Free of hormone disruptors
Supports intimate health without exposure to textile toxins or harmful chemicals.
Organic Cotton | Icelandic Seaweed | Eucalyptus | Clean Stretch
Wear your skincare
★★★★★
“I had no idea wearing natural undies can remove odor down there.”
— Zuzanna V.
★★★★★
“My UTI symptoms got better within a week of wearing these.”
— Kiara C.
★★★★★
“The first bralette I actually look forward to wearing.”
— Jacqui G.
Skincare for down there
Breathable, skin-loving intimate wear for sensitive bodies that deserve extra care.
Odor-neutralizing
Less moisture. Less odor. No unwanted smells down there.
Naturally breathable
Let your skin inhale and exhale through soft, airy comfort all day long.
GOTS
GOTS-Certified Organic Cotton (fabric level) · No Harmful Pesticides or Fertilizers
OEKO-TEX® STANDARD 100
OEKO-TEX® Certified Materials · Skin-safe dyes, SeaCell™ fabric, elastics & trims
C2C GOLD
ROICA™ V550 · Cradle to Cradle Certified® Material Health Gold level
Meet our Icelandic seaweed-infused fabric
From sea to skin.
Wild regenerative seaweed, carrying trace marine minerals are dried, ground and spun into eucalyptus lyocell from the fjords of Iceland.
A little ocean goodness, woven in.
Naturally rich in skin-loving marine trace minerals, vitamins, amino acids, and antioxidants.
Intimate Balance
Helps support a healthy intimate microbiome and natural pH balance
Moisture-regulating
Keeps your most sensitive skin feeling fresh, dry, and cared for all day long.
Three rare, clean fibers.
Our rare, skin-loving, signature blend.
The foundation
Organic cotton · 70%
Softness, rooted in nature.
The foundation
Organic cotton · 70%
Softness, rooted in nature.
non-GMO cotton is grown without pesticides, insecticides, or synthetic fertilizers. It uses less water than conventional cotton and supports healthier soil through regenerative farming, protecting your skin and the ecosystems where it grows.
The seaweed connection
SeaCell™ · 23%
A little sea-lovin’ in every pair.
The seaweed connection
SeaCell™ · 23%
A little sea-lovin’ in every pair.
Ascophyllum nodosum, a mineral-rich seaweed is harvested every four years from the pristine fjords of Iceland to support the natural regeneration of the marine ecosystem.
Retains up to 88% of its vitamins, minerals and amino acids after 50 washes, according to SeaCell™ testing.
The garment remains fully wearable and intact even as those naturally occurring compounds diminish over time.
An alternative stretch
ROICA™ V550 · 7%
Clean stretch that moves with you.
An alternative stretch
ROICA™ V550 · 7%
Clean stretch that moves with you.
Japanese degradable elastane: a cleaner alternative to conventional stretch fibres.
Decomposes into CO₂ + water: breaks down in biologically active conditions, unlike conventional spandex which takes centuries.
Cradle to Cradle Certified® Material Health Gold: rigorously assessed for health and safety.
WHY WE WENT THE EXTRA MILE
Still wearing toxic undies?
The fabric label only tells part of the story. How it’s grown, dyed, softened, stretched and finished matters too, especially when it sits this close to your skin.
WHY WE WENT THE EXTRA MILE Still wearing toxic undies?The fabric label only tells part of the story. How it’s grown, dyed, softened, stretched and finished matters too, especially when it sits this close to your skin. |
Thoughtfully, from fibre to finishKiseau
 |
Synthetic fibre familiesPolyester & nylon underwear
 |
Good, but not quite.Regular cotton & bamboo underwear
 |
|---|---|---|---|
Softening |
Softening: Softened with a gentle enzyme wash |
Softening: Relies harmful synthetic finishes for softness + performance |
Softening: Often chemically softened or heavily processed for a buttery feel |
Dyes |
Dyes: OEKO-TEX® Standard 100 certified dyes |
Dyes: Can contain azo dyes, lack of transparency |
Dyes: Can contain azo dyes, lack of transparency |
Endocrine disruptors |
Endocrine disruptors: Screened against endocrine disrupting textile chemicals |
Endocrine disruptors: Commonly carries endocrine-disruptors |
Endocrine disruptors: May contain endocrine-disrupting dyes + finishes |
Bleach |
Bleach: Never brightened with optical bleach |
Bleach: May be optically brightened or chemically finished |
Bleach: May be bleached, brightened or chemically finished |
Biodegradability |
Biodegradability: Designed to return to the earth at end of life as CO2 and water in microbiologically active soil |
Biodegradability: Lasts for centuries in landfills without degrading |
Biodegradability: Natural fibres, often held together with conventional spandex can persist for decades |
This compares fibre families, not individual competitor products. Certifications, blends and finishes vary by brand. Check each garment’s material information.
Know your materials@90s_flower_child_
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From the heart
The Kiseau Story
Nethmie created Kiseau with her partner David, after witnessing women in their close circle navigate endometriosis, autoimmunity, and chronic hormonal conditions. It made us question why underwear, the layer sitting closest to our bodies every day, was so often left out of the conversation around health and conscious living.
Kiseau was created as an antithesis to fast fashion and an industry that has normalized materials and practices that don’t always consider our bodies or our health.
We see intimate wear as an extension of skincare, and part of the wider ecosystem we’re all trying to create around ourselves. Every Kiseau piece is lovingly made to create a softer, more conscious space for you as you move through your everyday.
Nethmie & David
Meet Kiseau
Co-founders, Kiseau
A little peak into our journal
The Body Talks Edit
Heartwarming conversations with women from all walks of life, exploring intimate health, conscious living, hormonal health, detoxing, and everything in between.
Lydia Dupree ✺ The Chemistry Hiding in Your Clothes
Vol. 7 Lydia Dupree A degreed biochemist researching toxins in the fashion industry, Lydia reads a garment the way a scientist reads an ingredient list. Here she breaks...
Read the story
Noami Grevemberg ✺ Nomadic Living, Slow Fashion & Honoring Your Body
Vol. 6 Noami Grevemberg Here, the storyteller, off-grid living enthusiast and founder of Field + Fire Women's Collective dives into how natural fibers, slow living, and conscious consumption...
Read the story
Jess Willis ✺ Tight Clothing & Hormonal Cycles
Vol. 5 — Jess Willis When Jess Willis's meditation teacher told her to soften her belly and she couldn't, that was information. Here, the yoga teacher, poet, and founder...
Read the storyCommon Questions
What goes into the price of a Kiseau piece?
Every Kiseau piece is made with a rare, high-quality natural fabric blend that costs more to produce than conventional fabrics. We invest in fabric safety and work with OEKO-TEX® and GOTS-certified materials.
Our pieces are handmade in small batches, and we work with suppliers who share our commitment to fair, safe, and cleaner production.
From the fabric itself to our packaging, we make considered choices to reduce plastic and prioritize better materials. That naturally comes at a premium.
What are the benefits of natural underwear?
Natural fibers are naturally breathable, helping keep your intimate area cool, dry and comfortable, while synthetic fabrics can trap heat and moisture against the skin.
Kiseau’s signature blend of organic cotton, SeaCell™ and just a touch of clean stretch is designed to create a softer, toxic-free, breathable environment for your most intimate skin.
Why does Kiseau get softer with every wash?
We deliberately avoid strong chemical softeners that are often used to create an ultra-soft feel straight out of the package. Instead, we use a gentler enzyme wash that helps prepare the fabric while preserving the natural qualities of the fibers.
Because of this, your Kiseau pieces may feel slightly more structured at first, but they soften beautifully with a few wears and washes, especially when cared for with a gentle, natural detergent.
What is Comfort First?
On your first order, contact us within 21 days of delivery if the fit is not right. Eligible single underwear pieces qualify for an exchange or store credit. Sets, bundles and bralettes are excluded. See our full policy for eligibility and unopened-item returns.