TrustScore 4.9 | 13,834 reviews

Boyfriend Briefs 2.0

Boyfriend Briefs 2.0

๐Ÿฉธ๐Ÿฉธ๐Ÿฉธ๐Ÿฉธ Heavy Flow Protection

โœ” Designed for your heaviest flow days
โœ” Full front-to-back protection
โœ” The pair you'll reach for every period

$29.99
$29.99 $48.99
SAVE 38% Sold out
Grey
Grey
Black
Black

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Boyfriend Briefs 2.0

Boyfriend Briefs 2.0

$29.99
$29.99 $48.99
SAVE 38% Sold out
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Introducing Our Boyfriend Briefs 2.0 ๐Ÿ‘ฆ๐Ÿฝ โ€“ With Our New & Improved Gusset...

This new and upgraded style are designed to feel like you're wearing your boyfriend's undies - the comfiest boy leg fit, stretchy waist band and the softest material. All withย a gusset which extends from front and back to ensure NO leaking ๐Ÿ”’

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Free Shipping
Over $39.97
30-Day Risk Free Trial
Free From PFAs
& Chemicals
Sizing Guide
Size & Fit:

Lou & Lauren are wearing sizes Medium and XL.

Customer Feedback:

This style runs a little small - recommend sizing up.

How To Measure:

We want you to be as comfortable as possible on your period. Just follow the measurements above.

We recommend measuring yourself, and not going by your standard size. Each style and pair will vary, so please check this if ordering multiple styles.

If you're in-between sizes we recommend sizing up.

Waist: Measure the narrowest part of your waist, below the ribcage and above your hip bone.

Hip: Measure the fullest part of your hip, making sure the tape measure is straight.

Description

Flow: Heavy
Absorbency: 50mls
Tampons Equivalent: Up to 8-10 tampons*
Perfect For: Heavy days
Feels: Secure and comfy

*(Based on 5ml tampon)

Our NEW AuntFloโ„ข Boyfriend Brief 2.0 Undies are your go-to for embracing comfort and confidence on your heavy days! They hold up 8-10 leak proof tampons and provide leak-proof support without feeling super bulky.

They also have an extended gusset which ensures protection from front to back.

Our period undies are also PFA free. PFAs are absolutely not part of our AuntFlo product design.

Care: Pre-rinse, gentle cold machine wash, hang to dry, reuse and repeat.

OEKO TEX

Our fabrics are OEKO-TEXยฎ certified which have been laboratory tested with strict scientific standards to protect your health.

Made From:

Body: 95% cotton, 5% spandex

Lining: 95% cotton, 5% spandex

Middle: 80% polyester, 20% nylon

Risk-Free Trial

As per our 30 Day Risk-Free Trial, first time customers can try one garment from your first order risk-free.

You can read more about this here.

These returns rights are in addition to your usual Statutory Rights summarised in this policy.

Mix & Match

Mix and match colours and sizes of the same style period underwear.

Here's how to claim your free pairs:

๐ŸŽ To claim 1 FREE pair: Simply add 3 single pairs to your cart.

๐ŸŽ To claim 2 FREE pairs: Simply add 5 single pairs to your cart.

Please note: This offer can not be combined with other offers or discounts.

Worn and loved by over
50,000+ Women

Donโ€™t just take our word for it... see how women everywhere are wearing AuntFlo.

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Karina C. โœ“

I love these period undies! Super comfy and very...

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Sophie H. โœ“

So comfy I have been wearing them as bedtime shorts even...

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Laura M. โœ“

Haven't had my period since I brought them but they are...

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Stephanie T. โœ“

I brought them for my daughter with Down syndrome. She is...

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Item type:
Grey / S / 2 Pairs + 1 FREE ๐ŸŽ

Unbeatable Comfort

Soft, breathable fabric that feels like your everyday undies so you stay comfy, even on bloated or sensitive days.

Wear, Wash & Reuse

Ditch single-use products for good with period undies you can wash, rewear, and rely on. Better for your body, your wallet, and the planet.

Female Founded

Designed by women who understand periods firsthand. Created for real bodies, real comfort, and real life.

Ending Period Poverty

Helping make period care more accessible so more women can feel comfortable, confident, and supported every cycle.

Have Questions?
AuntFlo Will Answer...

? What if I get the wrong size?

Uh oh, you've grabbed the wrong size...

Unfortunately, due to AuntFlo products being labelled as Sanitary products, we are not able to switch these over for you.

If you are a first time customer with us, please email hi@auntflo.au for assistance.

? Do I wear them on their own?

Depending on your flow and absorbency level, our period undies can be worn on their own or with added protection.

? Is AuntFlo free from PFAs?

Our period undies are PFA free. PFAs are absolutely not part of our AuntFlo product design.

? How often should I change them?

Knowing when to change your period underwear depends on your flow, absorbency level, and personal comfort.

1. Flow Level

Light Flow: Up to 8 hours depending on absorbency.

Moderate Flow: Every 6-8 hours.

Heavy Flow: Every 4-6 hours to prevent leaks.

2. Signs of Full Absorbency

Change when you feel dampness, discomfort, or reduced confidence.

3. Personal Comfort

Always listen to your body and change when needed.

4. Activity Level

More activity may require more frequent changes.

5. End of Day / Overnight Use

Consider changing after 8-12 hours depending on your flow.

? 30 Day Risk-Free Trial

First time customers can try one garment from their first order risk-free.

You can read more about this here.

? Shipping information

Orders are dispatched with tracking information provided by email.

Australia, New Zealand and UK shipping details are shown at checkout.

Customer Reviews

Women from all over Australia, UK & New Zealand are living comfortable and confident!

โ˜…โ˜…โ˜…โ˜…โ˜… 596 Reviews
Jemma W. โ— Verifiedโ˜…โ˜…โ˜…โ˜…โ˜…

Iv successfully been converted from tampons to aunt flo's period undies. Perfect fit, comfy and I no longer fear any leaks/overflows at work. Fantastic

Item type:
Black / S / 2 Pairs + 1 FREE ๐ŸŽ
Sophie H. โ— Verifiedโ˜…โ˜…โ˜…โ˜…โ˜…

So comfy I have been wearing them as bedtime shorts even when I'm not on my period.

Madiโ˜…โ˜…โ˜…โ˜…โ˜…

Very comfortable, I am recently postpartum with a lot of changes to my cycle. These have been great.

Silvia R. โ— Verifiedโ˜…โ˜…โ˜…โ˜…โ˜…

Love them! Comfortable, perfect fit and feeling confident wearing them.

Amber W. โ— Verifiedโ˜…โ˜…โ˜…โ˜…โ˜…

Love everything about it. Comfortable, very absorbent and looks nice too.