Name: Classic Period Brief
Brand: Fri Period
SKU: FB1-BK-XS
Price: 37.0 AUD
Availability: InStock

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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

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

Breathable, comfy and non-toxic period underwear for all-day comfort & confidence

Leak Protection

You Can Trust

Comfort

Without The Chemicals

Icon showing Fri Period underwear is eco friendly

Kinder

To Your Body & The Planet

Leak Protection

You Can Trust

Comfort

Without The Chemicals

Kinder

To Your Body & The Planet

'These are next level amazing. Super absorbent, delightfully comfortable'

Julie

'These are amazing! I never knew what I was missing by not having these in my life!'

Anna, Vic

'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, WA

'I've tried several brands of period underwear, but this one really stood out. The coverage was noticeably better, offering more security. The fabric felt soft yet durable, and it held up well after washing.'

Havva, WA

Accessories

Travel essential

Wet Bag

$19.00

As Seen In

Classic Period Brief - Fri Period - Organic Cotton and Bamboo

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

$37.00

Tax included. Shipping calculated at checkout.

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Choose Better for the Planet

No Waste

Resuable for 2 years

One Tree

Planted For Every Pair

Recycling symbol in teal on a white background

Eco

Compostable packaging

No Waste

Resuable for 2 years

One Tree

Planted For Every Pair

Eco

Compostable packaging

Hear From People Like You

★★★★★
I've tried several brands of period underwear, but this one really stood out. The coverage was noticeably better, offering more security—especially on heavier days. The fabric felt like higher quality compared to others I've used, soft yet durable, and it held up well after washing. It offered reliable protection without sacrificing comfort or style.
Havva
Perth, Australia

★★★★★
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, thanks to these classic briefs from Fri Period! For the first time in forever, I now have a reliable pair of period undies where I don’t need to have backup pads on hand. I can wear these with confidence all day long.
Frances
Palo Alto, CA

★★★★★
I'd been wanting to try period underwear and then a friend got me these. I was nervous at first but they absolutely do the job and are so comfy to wear. Washing is easy and they come out like new each time. Plus the print is really cute. I'm def gonna get more!
Noela
Houston, TX

★★★★★
The last thing I want on my period is more discomfort. This underwear has made this time of the month so much more comfortable.
Rebecca

★★★★★
I waited to go through two cycles prior to reviewing. I wore the underwear on both a medium/light day, as well as on a heavy day. They are very comfortable and held everything in with no leaking. They are easy to care for and washed well. It is great to purchase a sustainable product that is also packaged in sustainable, compostable packaging! I will definitely be purchasing again!
Megan
California

Looking for period underwear that actually feels good? You’re in the right spot. This is our complete range—soft, breathable, and made for everyday comfort with absorbent gussets that work as hard as you do. Whether it’s your first time trying period panties or you’re switching from menstrual pads and other menstrual products, our designs make the change simple (you might even forget you're on your period, they're that comfy!)

Choose your style and enjoy leak prevention without the bulk.

Why choose Fri Period underwear?

Everyday‑soft organic cotton and bamboo (like a natural odor-busting and antibacterial treatment!)
Designed by textile engineers for superior absorbency speed
Completely reusable to replace all your single‑use period products (no more monthly trips to the period aisle!)

Helpful Guide + Reassurance

Still wondering if period underwear is right for you? Think of it like your favourite undies, but with an absorbent layer that manages menstrual blood effortlessly. From our bestseller - the Classic Super Brief to the best Period Boxers, our leakproof levels keep you covered—even through leak‑free nights. Each pair is crafted from organic cotton and absorbent fabrics, giving you 360 degrees coverage and a panty‑like fit.

Switching from menstrual cups, ultra thin pads, or even disposable period underwear? Our products are designed to give you the same peace of mind without the waste.

Not sure where to start? Get advice in our guide for first‑time period underwear users—from absorbent fabrics to finding your perfect fit. Or read our comfier period tips for making menstrual flow days easier.

Build your set today—Fri Period’s collection makes managing your cycle simple, sustainable, and comfortable.

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Breathable, comfy and non-toxic period underwear for all-day comfort & confidence