Heavy Period Boyshorts
✔ Holds 8–10 tampons
✔ Full front-to-back protection
✔ No leaks, even overnight
Lou & Lauren are wearing sizes Medium and XL.
This style runs a little small - recommend sizing up.
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.
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 AuntFlo™ 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. Read our FAQs for more.
OEKO TEX
This product is OEKO-TEX® STANDARD 100 certified and has been tested for harmful substances.
Certificate: 26.HCN.42389
Testing Institute: Hohenstein/HTI
Made From:
Body: 95% cotton, 5% spandex
Lining: 95% cotton, 5% spandex
Middle: 80% polyester, 20% nylon
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. Please read this returns policy carefully as it contains important terms relating to your purchase.
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.
Holds up to 8-10 tampons
Leak-proof for peace of mind
Perfect for overnight protection
Better for you & the planet
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!
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.
Our period undies are also PFA free. PFAs are absolutely not part of our AuntFlo product design.
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:
Overall, always listen to your body and make changes when you start feeling uncomfortable, to maintain confidence and hygiene.
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).
You can read more about this here.
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.
Country - Australia
Country - New Zealand
Country - UK
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.
Women from all over Australia, UK & New Zealand are living comfortable and confident!
Overall rating: 4.1 / 5 from 109 reviews.
I am a first time customer after seeing the add consistently pop up on FB. I hesitated to order as i didnt know which size to get, after reading reviews i still ended up ordering the wrong size. I emailed Auntflo after seeing their replacement guarantee for first time customers and I was replied to instantly and was sent a replacement straight away. I was so happy with the service and product is extremely soft.
I love these period undies! Super comfy and very absorbent. Definitely recommend Aunt Flo undies!
Would rather not be addressed as “Mrs” in correspondence (non-binary person who specifically bought the boxer short style for dysphoria reasons)
Love love love themmm!!!!! There’re so comfy and leak proof! I especially LOVE how they are have a mix of sexy underwear! The g-strings and cheetah print are so great, especially when wanting to go out and you’re on your last days or even have a light flow. They still make you feel so pretty!!🤩 I RATE THEM!!!!!
Wow.. I didn’t like the idea of period underwear but kept seeing these online. I tried them out and I love them , all the negative thoughts I had were taken away! I use these for days I’m at home relaxing and overnight and never leaked and I suffer with endo. I love the fact they are stylish too! Would recommend and customer service was great b
It looks like it holds a lot
Good coverage top is a tight fit with the thinner elastic than actual BF boxers... shorter than BF boxers, I love them...
Really comfy.
These are an absolute life changer! As someone who suffers with painful periods and very heavy flows i now have one less worry because these period undies have me covered! The seamless sports undies do not even feel like usual bulky period undies, they are discreet and still absorb enough to make you stay comfortable and not worried about leaking. The body shorts! Omg so much comfort. I originally didn’t read the size chart properly and went with my usual undies size- i would recommend sizing up, however i sent an email to the support team to ask them about this and within 10 minutes they were organising for the next size up to be posted out to me free of charge- best customer service. I didn’t have to send the other ones back so instead i passed on to my sister who then went on to purchase some more ! I could not recommend these any more and i have been telling everyone about these. Thank you so much!
Great product! Really takes the stress out of those heavier days!!
The photo is grey boy leg but find these black ones just as good too. Very comfortable, contain bladder leaks from coughing, pre medipause and from heavy periods. High recomend them
This product really has made my periods a lot easily to deal with. I have a heavy flow and there have been times when I have been out for work or with friends when I have had leakage accidents. So I did start to try and plan to be home based when my period came around. On using these, a massive game changer! They are a snug fit, which I like because I feel supported, I have been out and no leaks, and even sleeping, I often found leaks, I have been able to sleep peacefully with no leaks. I love these so much I want another pair of them. Xxx
So comfortable and I DIDNT LEAK !!!! Love them so much thank you for making my period not so annoying to deal with !!!!
Do the job perfectly and wish I had more
These are amazing! As a heavy flo gal I’ve never trusted period undies overnight but I’m delighted to say these did not leak & felt super comfortable too. They definitely run very small, I’m usually a 10/medium in this brands other period undies but for these I was an XXL. That aside, no complaints!
Reviews weren’t lying when they said it was very secure! I love the support it gives- truly nothing else like that out there!
These are amazingly comfortable & made from really soft material. I highly recommend these 2.0 boyshort style period underwear
Unfortunately I couldn't wear these as they were way too small, even though the other things I bought in the same size fit perfectly. Happily, they fit my bestie perfectly, and she loves them
These are actually fantastic. Great shape. Wore all night comfortably and didn’t dig in which is imported when you are tender and bloated. Thanks!
The most comfortable affordable undies ever!
Good absorbency comfy material
Great!
Daughter loves them, she had confidence in them
Fantastic love them
very good
Worked well overnight
