No Toxins, No Compromises: Why We Make Period Underwear Without PFAS

The last thing your body needs during your period is exposure to toxic chemicals. At Fri Period, we believe what goes against your skin should never work against your health. That’s why every single pair of our reusable period underwear is proudly made without PFAS, heavy metals, or other harmful treatments — those “forever chemicals” that have no place near your body.

If you're looking for period panties that are safe, sustainable, and tested for toxins at the source, you're in the right place.

First of All... What are PFAS?

PFAS (per- and polyfluoroalkyl substances) are a group of man-made chemicals used in everything from non-stick pans to stain-resistant and water-resistant textiles. They’re great at repelling water and oil — but not so great for your body. Studies link PFAS exposure to hormone disruption, immune suppression, fertility issues, and more.

And because PFAS don’t break down easily (hence the nickname “forever chemicals”), they accumulate in your body and the environment over time.

That’s why it’s alarming to know some popular period underwear brands have been found to contain PFAS through lab testing.

PFAS Don’t Belong in Your Undies

Your vulva is one of the most sensitive and absorbent areas of your body. That means any toxic treatments used in your menstrual underwear can actually enter your body. And if you’re someone with hormone-sensitive conditions like PCOS or adenomyosis (same here 🙋♀️), you cannot risk additional endocrine disruption.

Our founder, Nina, knows this all too well.

A Brand Built From Lived Experience

“I have PCOS and adenomyosis. My hormones are already struggling — I don’t want to wear something that could throw them off even more.”

That’s what Nina said when she started Fri Period. She couldn’t find period products that she felt were non-toxic, comfy, and actually worked while being supportive of her hormonal health. So she made them.

What Makes Our Period Underwear Safe?

Every product we make is designed with your body and wellbeing in mind.

Here’s how we stand out:

✅ Made Without Using PFAS, Heavy Metals, or Harmful Chemicals

We avoid harmful finishes entirely. Our Oeko-Tex Certified materials are tested by third-party labs to ensure safety from heavy metals, PFAS, and other toxins.

✅ Organic cotton inner gusset

The layer that touches your skin is made from GOTS certified organic cotton. It’s breathable, hypoallergenic, and pesticide-free — perfect for first periods, sensitive skin, and postpartum recovery.

✅ Plant-Based Waterproof Barrier

Instead of chemical-laden layers, we use a plant-based water-resistant treatment for effective leak protection. This advanced barrier is safe, sustainable, and just as effective as synthetic coatings — minus the health risks.

✅ OEKO-TEX® STANDARD 100 Certified Layers

Our outer materials are OEKO-TEX® STANDARD 100 certified, meaning they’ve passed rigorous testing for over 100 known toxins and are completely safe for skin contact.

✅ Moisture-Wicking Fabric for All-Day Comfort

Our moisture-wicking fabric pulls wetness away from your skin, keeping you dry and irritation-free — even on heavy flow days.

✅ Multi-Layer Absorbent Waterproof Protection

Each pair features multi-layer absorbent waterproof protection, a stain block liner, and leakproof backing for full-cycle confidence.

Your Period Shouldn’t Be a Health Risk

If you care about what goes in your body, you should care about what goes on it, too. Choosing PFAS-free menstrual underwear is one of the easiest ways to reduce your exposure to harmful substances and protect your hormone health long-term.

We’re one of the few period underwear brands with a complete commitment to non-toxic design and transparent sourcing.

Our Squeaky Clean Lineup

Whether you need protection for light spotting or heavy-duty absorbency, we’ve got you covered:

• The Classic Brief – Soft, high-waisted, and absorbent enough for heavy flow.
• The Boxer Brief – Made for maximum performance and maximum comfort.
• The Low-Rise Hipster– Flattering low-rise fit but powerful period performance.

All made with certified organic materials, sustainable sourcing, and zero toxins.

Built Different – Because You Deserve Better

You won’t find greenwashing here. Just clean fabrics, ethical production, reusable period underwear you can trust, and a community that actually gives a damn.

Every time you choose Fri Period, you’re:

• Reducing your exposure to forever chemicals
• Supporting certified organic and Oeko-Tex Certified materials
• Choosing products built from a place of lived experience, not just marketing

Because every body deserves better. And your period panties should be part of the solution — not the problem.

FAQs

Q1: Why is PFAS-free period underwear important?

Because your vulva is super absorbent. PFAS can interfere with hormones, immune function, and fertility — especially with repeated exposure.

Q2: What materials do you use instead of toxic waterproof layers?

We use a plant-based water-resistant treatment combined with a multi-layer absorbent waterproof protection system. It’s safe, breathable, and effective.

Q3: Can these be used for postpartum or bladder leaks?

Absolutely. Many customers use our high-absorbency period panties during postpartum bleeding, light bladder leaks, and even perimenopause.

Q4: How do I wash them without compromising the absorbency levels?

Wash in cold water, skip the fabric softener, and air dry. It couldn't be easier!