Name: Classic Period Brief
Brand: Fri Period
SKU: FB1-BK-XS
Price: 29.0 USD
Availability: InStock

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Free Shipping & 20% Off When You Get 4+
Hassle-Free Returns
1 Tree Planted For Every Pair

Free Shipping & 20% Off When You Get 4+
Hassle-Free Returns
1 Tree Planted For Every Pair
Free Shipping & 20% Off When You Get 4+
Hassle-Free Returns
1 Tree Planted For Every Pair

Free Shipping & 20% Off When You Get 4+
Hassle-Free Returns
1 Tree Planted For Every Pair

Free Shipping & 20% Off When You Get 4+
Hassle-Free Returns
1 Tree Planted For Every Pair

Your Comfiest Period Ever

Tired of bulky period products that are full of questionable chemicals and constantly leak?

Shop now →

I created Fri Period because I wanted a period product that actually worked and that was better for my body & the planet.

— Nina, Founder

Loved & trusted by 1000+ customers

Absorbs 3+ regular tampons worth

Made without toxic chemicals

Reusable for 2+ years

Breathable, soft & comfy

Classic Period Brief - Fri Period - Organic Cotton and Bamboo

Explore award-winning period underwear for all-day comfort & confidence

Leak Protection

You Can Trust

Comfort

Without The Chemicals

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Kinder

To Your Body & The Planet

Leak Protection

You Can Trust

Comfort

Without The Chemicals

Kinder

To Your Body & The Planet

'I’m so grateful to discover this brand! I have been wearing period pants from other brands for years but have never found any that are perfectly leakproof — until now!'

Clare

'The quality and fabric technology completely exceeded my expectations. The leak-proof protection worked perfectly, even on heavier days. The classic briefs are incredibly comfortable and breathable.'

Alana

'Super comfortable and reliable...Amazing leak protection. I love how soft and breathable the fabric is, and it keeps me feeling secure all day without any bulk.'

Aaleeyah

'You can tell that the quality of these are so much better than other period underwear brands. They feel so much more comfortable and have more coverage. I highly recommend trying them.'

Grace

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Seen
In

Accessories

Use on-the-go

Self-heating cramp soother

$6.00

Travel essential

Waterproof Wet Bag

$22.00

Classic Period Brief - Fri Period underwear - Suitable for women of all shapes and sizes

Classic Period Brief - Fri Period - Rear view, full gusset coverage

Classic Period Brief - Fri Period - PFAS-free organic cotton+bamboo period underwear

Classic Period Brief - Fri Period - Period Underwear with a gusset that hides any stains

Fri Period - Period underwear in it's compostable and biodegradable packaging

A review of Classic Period Brief - Fri Period - A customer shares her testimonial

Classic Period Brief - Fri Period underwear sits high on the waist

Review of Classic Period Brief - Fri Period

$29.00

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Choose Better for the Planet

No Waste

Resuable for 2 years

One Tree

Planted For Every Pair

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Eco

Compostable packaging

No Waste

Resuable for 2 years

One Tree

Planted For Every Pair

Eco

Compostable packaging

Looking for period underwear without PFAS that’s actually comfy, reliable and kind to your body? You’re in the right place. At Fri Period, we believe no one should have to compromise their health or the planet just to manage their cycle.

Our award-winning reusable period underwear is made without toxic forever chemicals like PFAS, heavy metals, or other toxic chemicals — because you deserve to bleed without worry.

Crafted from GOTS-certified organic cotton, bamboo, and Oeko-Tex certified materials (meaning they're tested and verified for harmful substances), each pair is breathable, soft, and designed to keep you feeling dry and confident all day. We combine comfort with science-backed design to give you sustainable period care that actually works — no weird coatings or greenwashing.

Curious about per- and polyfluoroalkyl substances (aka PFAS) and why they have no place in your underwear drawer? Head over to our PFAS-Free Period Underwear blog for the lowdown.

Switching to PFAS-free period panties for the first time? You’re not alone — and we’ve got your back. Our undies are designed to be as easy to use as they are comfy, whether you’re brand new to leakproof wear or you’re a long-time eco-period pro.

To get the best out of your pair, check out our beginner’s guide to period underwear — it’s packed with tips, care info, and answers to all those “umm… is this normal?” questions.

Our mission is simple: to take the stress out of periods and make them better for your body, your budget, and the planet.

Still have questions? Check out our FAQs or drop us a message — we’re always here to help you have a better period, no toxins attached.

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Your Comfiest Period Ever

Explore award-winning period underwear for all-day comfort & confidence

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Classic Period Brief

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