With so many period underwear brands flooding the market promising “leak-proof” protection, women have more eco-friendly and reusable menstrual product choices than ever before. But recent news has raised a red flag about what’s inside some of those trusted undies. Enter: PFAS – toxic “forever chemicals” that should never be anywhere near your intimate areas.
Let’s unpack what PFAS are, why they’ve been found in period underwear, and most importantly — how Gentle Day® is different.
What Are PFAS?
PFAS (per- and polyfluoroalkyl substances) are synthetic chemicals that have been widely used since the 1940s in products that resist heat, oil, stains, and water. You’ll find them in everything from non-stick cookware and waterproof jackets to fast food wrappers. But here's the catch: PFAS don’t break down easily in the environment — or your body. That’s why they’re often called “forever chemicals.”
PFAS in Period Underwear — A Dangerous Discovery
In recent years, several investigative reports and lab tests (including studies by Mamavation and Environmental Health News) have uncovered concerning levels of PFAS in popular brands of period underwear — including brands that market themselves as “organic,” “safe,” or “eco-friendly.”
Why would anyone use PFAS in underwear? Often, it's to create a moisture-resistant barrier or anti-leak layer. But at what cost?
PFAS exposure has been linked to:
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Hormone disruption
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Immune system suppression
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Reduced fertility
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Increased risk of certain cancers
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Skin irritation
Wearing underwear with PFAS regularly — especially around sensitive vaginal tissue — is cause for serious concern.
Gentle Day® Period Panties: 100% PFAS-Free
At Gentle Day®, we don’t believe you should compromise your health for leak protection. That’s why we made it our mission to create period underwear that’s not only comfortable and effective — but also safe.
✅ Our Period Panties Have Been Independently Lab Tested for PFAS — and Passed with Flying Colors.
In February 2025, we sent our Gentle Day® period panties to a certified international lab for PFAS testing. The results confirmed: ZERO traces of PFAS in the fabric, including the moisture-barrier layer.
📜 Need proof? We keep the lab results on file and are happy to share them with retailers, healthcare professionals, and customers upon request. Transparency matters to us.
What Makes Gentle Day® Period Underwear Different?
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No PFAS or harmful chemicals – We use safe, certified materials from top to bottom.
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Certified organic cotton layer – Skin-friendly and breathable, especially for those prone to irritation or infections.
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Absorbent, eco-friendly polymer core – Holds up to 40 ml of fluid depending on style — without compromising comfort.
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Leak-proof but breathable – Thanks to smart layering without synthetic fluorinated chemicals.
Certifications You Can Trust
Gentle Day® hygiene products are certified by trusted third-party agencies including:
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OEKO-TEX® 100 Class 1 – Safe for direct contact with babies’ skin (and yours!)
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Vegan & cruelty-free by V-label
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ISO 9001 & ISO 14001 manufacturing standards
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FSC-certified packaging
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GOTS for organic materials in tampons and liners
Our commitment to clean, responsible manufacturing extends to every product in our line — including our reusable period panties.
Choose Safer Protection. Your Body Deserves It.
The truth is, you shouldn’t have to guess whether your period products are safe. At Gentle Day®, we take the guessing out of the equation. We care about your health, your comfort, and your trust.
If you’re switching to period underwear, make sure they’re actually safe to wear.
👉 Shop Gentle Day® PFAS-Free Period Panties
Your cycle deserves the cleanest protection — no compromises.