✔ Holds 8–10 tampons ✔ Full front-to-back protection ✔ No leaks, even overnight
Free Shipping
Over $99
30-Day Risk Free Trial
Free From PFAs
& Chemicals
Sizing Guide
Size & Fit:
Zoe is wearing a size XL.
CustomerFeedback:
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 Lace Boyfriend Brief 2.0 Undies are your go-to for embracing comfort and confidence on your heavy days! They hold up to 8-10 leak-proof tampons and provide 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. Read our FAQs for more.
OEKO TEX
This product is OEKO-TEX® STANDARD 100 certified and has been tested for harmful substances.
These returns rights are in addition to your usual Statutory Rights summarised in this policy. Please read this returns policy carefully as it contains important terms relating to your purchase.
Mix & Match
Mix and match colours and sizes of the same style period underwear.
Here's how to claim your free pairs:
🎁 To claim 1 FREE pair: Simply add 3 single pairs to your cart. The offer will be automatically applied to one pair.
🎁 To claim 2 FREE pairs: Simply add 5 single pairs to your cart. The offer will be automatically applied to two pairs.
Please note: This offer can not be combined with other offers or discounts.
Don’t just take our word for it... see how women everywhere are wearing AuntFlo.
Heavy Period Protection
Holds up to 8-10 tampons
Front-To-Back Gusset
Leak-proof for peace of mind
Sleep Without Stress
Perfect for overnight protection
Wear, Wash, Reuse
Better for you & the planet
Slideshow
With Our 4-Layer Technology
Designed by women to be as comfy as your favourite pair of undies, but with powerful absorbency you can count on 🩸
Layer 1: Top Layer
Designed for contact with the vulva, this layer is breathable and helps keep you cool and dry, allowing your skin to breathe freely.
Layer 2: Absorbency
Designed for contact with the vulva, this layer is breathable and helps keep you cool and dry, allowing your skin to breathe freely.
Layer 3: Waterproof
This layer forms a protective shield against leaks, delivering all-day confidence and dependable protection you can trust.
Layer 4: Cotton
Made from soft cotton, this layer binds all components together to ensure maximum comfort and high-performance support.
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. You will need to keep these.
Returned sanitary products cannot be resold, despite claims of them being unused, unworn, and unwashed. This is to maintain and uphold strict hygiene, health, and safety standards to protect our customers and warehouse staff.After all, we’re not only here for the planet, but also for your health!
However, if you are a first time customer with us, we can gift you one pair of underwear (in your correct size) if you have accidentally initially purchased the wrong size.
Please email us at hi@auntflo.au to chat more about this!
Do I wear them on their own?
Depending on your flow, and the absorbency level of the underwear you have chosen, you can wear our period undies on their own, or with some added protection.
Take some time to figure out what works best for you! Every period is a unique one.
Is AuntFlo free from PFAs?
Our period undies are also 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 a few factors, such as your flow, the absorbency of the underwear, and your personal comfort. Here are some general guidelines to help you determine when it’s time to change:
1. Flow Level
Light Flow: If you have a lighter flow, you may be able to wear your period underwear for up to 8 hours without needing to change, depending on the product's absorbency rating.
Moderate Flow: For moderate flow, you should change your period underwear approximately every 6-8 hours, especially if you feel any dampness or discomfort.
Heavy Flow: On heavy flow days, it's best to change your period underwear every 4-6 hours to prevent leaks. You may need to change more frequently depending on the volume of blood absorbed.
2. Signs of Full Absorbency
Feeling Damp or Wet: If you begin to feel moisture or dampness through your period underwear, it’s a sign that it has reached its absorbency capacity, and you should change them.
Discomfort: If the underwear starts feeling uncomfortable or you're aware of the fabric sticking to your skin, it's a good idea to change them to maintain comfort and hygiene.
3. Personal Comfort
If you start feeling less confident or comfortable, even if the underwear hasn't reached its absorbency limit, it's a good idea to change them. Comfort is key to feeling confident and secure during your period.
4. Activity Level
If you're very active, especially if you're exercising, swimming, or moving around a lot, you might need to change your period underwear more frequently. The increased movement can cause absorption levels to change, and you may feel more comfortable changing to ensure there are no leaks.
5. End of Day / Overnight Use
If you’re using your period underwear overnight, you may want to change them after 8-12 hours, depending on your flow. Consider pairing them with a menstrual cup or tampon for additional protection if you experience a very heavy flow.
Overall, always listen to your body and make changes when you start feeling uncomfortable, to maintain confidence and hygiene.
30 Day Risk-Free Trial
As per our 30 Day Risk-Free Trial, first time customers can try one garment from your first order risk-free. If you're not satisfied with how it functions, we'll gladly refund the cost of that single item (excluding shipping costs).
These returns rights are in addition to your usual Statutory Rights summarised in this policy. Please read this returns policy carefully as it contains important terms relating to your purchase.
Shipping information
Country - Australia
FREE Standard Shipping (5-15 Business Days) for orders over $99AUD
Standard Shipping - $9.99 (Orders under $99AUD)
Country - New Zealand
FREE Standard Shipping (5-15 Business Days) for orders over $99NZ
Standard Shipping - $9.99 (Orders under $99NZ)
Country - UK
FREE Standard Shipping (5-15 Business Days) for orders over £50
Standard Shipping - £5 (Orders under £50)
Once your order has been dispatched, we'll send you an email with a tracking number.
If your order hasn't arrived after 15 days please email us immediately and we'll follow up with the courier.
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Customer Reviews
Women from all over Australia, UK & New Zealand are living comfortable and confident!
Customer Reviews
Overall rating: 4.4 / 5 from 50 reviews.
I loved the fit and the little lace detail at the waistband. It felt so nice to have a cute little detail on my period undies. I also loved that I didn’t have to worry about leakage from the front or than back like with other brands. Maximum comfort and minimal effort. Makes my period a breeze. Thank you Aunt Flo 🥰
Since being postpartum, and suffering a couple of losses prior to having my little girl, my cycle has never fully gone back to what it was. It has been super heavy and led me to feeling uncomfortable for the first few days, particularly at night. I was super hesitant to try these, but thought I may as well give them a go. It's the first time in over two years that I've felt a sense of comfort when going to bed in those first few nights of my cycle, and being able to go about my day without having to worry about changing products has been fantastic. I'm thinking about trying a lighter pair for the later days now.
They are comfortable, i dont leak (even though my period is super heavy) and the full gusset offers a level of protection that even pads can't. They clean well and dry quickly.
Haven't had my period since i brought them but they are comfy and seem to have a really good strip of absorbancy front to back. I work out and about on the road going to different farms so often can't get to a bathroom so easily.
I wanted something that i could feel safe working in all day especially on the heavier days without worrying about leaking and these do look like they'll do the trick. Although I'll still test them on a non working day first just in case lol
Comfy as ! And very importantly to me they don't rub and cause pimples like other brands I've tried can do because the gusset goes all the way to the top!
I feel stress free when wearing these period undies at night time and throughout the day. I feel super comfortable, and where I would get irritated wearing pads and tampons, I can wear these with ease and comfortability. I highly recommend!
They are perfect day and night regardless of flow saved my young lady alot of embarrassment in school carrying supplies as she grows her confidence and Independence will continue to grow huge thanks to aunt flo x
Super comfy!! Really good quality briefs with so much support. I still wear pads with them but its nice to not have to worry about leaking while also looking good!!
So much better than others I've tried. Do check sizing, might be because I'm used to uk sizes and these are on the tighter side, but on me for not checking!
I was skeptical, but went for it and used these overnight with absolutely zero regrets. They absolutely do everything they say they will. My only complaint about these (and the whole line) is that you have to air dry them and I live in a very humid area, so it takes +/- 24 hrs for each pair to dry. Otherwise, absolutely amazing product. Will absolutely keep using them.
I am new to using this brand but I have received the most amazing customer service! I would 100% recommend and continue to use based on that alone. I also love the one pair of underwear that I have and look forward to trying more.
These are amazing!! Love the full front and back gusset makes such a difference! Loose waist band is great when I feel so bloated, these are so comfortable!!! Love love love them!!
These are my absolute favourite 😍. It's like a comforting hug from a loved one but in undie form. I wish my every day undies were as lovely feeling as my period undies.
For someone who has suffered long, heavy periods for most of my life, these have been a game changer. I feel so comfortable and confident wearing these. Would absolutely recommend
Comfortable af!
I wear these everyday -- mum of 2! No leaks ... no smells ... probably not meant to but once rinsed the go in my usual washing cycle then into the dryer.
These are so comfy the coverage is perfect for me as I have endometriosis- this brand is the best so far, and I’ve tried so many! Comfortable and great protection! Thank you yes! These shorts are perfect for bed
I loved the boxers feel, with no seems that would dig in. The lace was a nice feminine touch too.
I wore these for a few hours, but had to take them off when they started to irritate my skin too much, so I had to take them off. Otherwise, they're great.