20% OFF & FREE SHIPPINGOn orders over $100

HASSLE-FREE RETURNS30 Days To Change Your Mind

ONE TREE PLANTEDFor Every Order

Three women wearing Fri Period underwear

Three women wearing Fri Period underwear

THE COMFIEST, NON-TOXIC

Period Underwear

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Excellent 4.9 | 1000+ Happy Periods

Award-Winning Period Underwear

Classic Period Brief - Fri Period - Organic Cotton and Bamboo

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

Classic Briefs

$29.00

Period Boxers - Fri Period

Period Boxers - Fri Period

Period Boxers

$34.00

Low - Rise Hipster - Fri Period

Low - Rise Hipster - Fri Period

Low-Rise Hipsters

$27.00

Waterproof 2L washbag - Fri Period

Waterproof 2L washbag - Fri Period

Waterproof Wet Bag

$22.00

Made without PFAS or nasty chemicals

Icon showing Fri Period underwear's triple layer tech

Leak-proof, breathable & ultra absorbent

Icon showing Fri Period underwear is eco friendly

Ethically made & planet-friendly

Made without PFAS or nasty chemicals

Icon showing Fri Period underwear's triple layer tech

Leak-proof, breathable & ultra absorbent

Icon showing Fri Period underwear is eco friendly

Ethically made & planet-friendly

'Incredibly comfortable and breathable. The leak-proof protection worked perfectly.'

Alana, WA

'The quality of these are so much better than other period underwear brands.'

Grace, PA

'I have been wearing period pants from other brands for years but have never found any that are perfectly leakproof - until now!'

Clare, CA

'I am honestly blown away. Totally hassle free... these were SO comfortable and SO brilliant.'

Katie S.

Person wearing a patterned shirt and Fri Period boxer briefs, standing in a room with a chair and plant.

Person taking a mirror selfie wearing Fri Period's Low-rise Period Hipsters

Woman wearing a white sweatshirt and Fri Period underwear against a white wall.

Person wearing a leopard print shirt and Fri Period Boxers indoors.

Person wearing a patterned shirt and Fri Period boxer briefs, standing in a room with a chair and plant.

Person taking a mirror selfie wearing Fri Period's Low-rise Period Hipsters

Period Comfort You Can Count On

With 1000+ happy customers, we're confident you'll LOVE our products. But just in case, we have a hassle-free returns policy.

5 Star Reviews

Easy Returns

Secure Payment & Checkout

Woman wearing a white sweatshirt and Fri Period underwear against a white wall.

Person wearing a leopard print shirt and Fri Period Boxers indoors.

Impact that goes beyond a comfier period

Person holding a small plant with soil in their hands

A tree is planted for every order

Each pair prevents 100's of tampons/pads from landfill

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No plastic packaging (our bags are 100% biodegradable)

Two brown bottles with hazardous material labels featuring warning symbols.

We avoid toxic chemicals that impact your health & hormones

Your Period Must-Haves

The female founders of Fri Period underwear with a customer

Small Business, Big heart

Our Story

With 1.8 billion of us menstruating each month, we're on a mission to make periods better - for you, and for the planet.

Fri Period | Period Underwear For A Cleaner, Comfier Period