• 1 Tree Planted For Every Pair

  • Women-Owned

  • Secure Payment

  • Hassle-Free Returns

  • 1 Tree Planted For Every Pair

  • Women-Owned

  • Secure Payment

  • Hassle-Free Returns

  • 1 Tree Planted For Every Pair

  • Women-Owned

  • Secure Payment

  • Hassle-Free Returns

  • 1 Tree Planted For Every Pair

  • Women-Owned

  • Secure Payment

  • Hassle-Free Returns

  • 1 Tree Planted For Every Pair

  • Women-Owned

  • Secure Payment

  • Hassle-Free Returns

  • 1 Tree Planted For Every Pair

  • Women-Owned

  • Secure Payment

  • Hassle-Free Returns

Period Boxers - Fri Period
Period Starter - Fri Period
Period Boxers - Fri Period
Period Boxers - Fri Period
Period Boxers - Fri Period
Period Boxers - Fri Period
Period Boxers - Fri Period
Period Boxers - Fri Period
Period Starter - Fri Period
Period Boxers - Fri Period
Period Boxers - Fri Period
Period Boxers - Fri Period
Period Boxers - Fri Period
Period Boxers - Fri Period

Period Boxers

  • Suitable for Light-Heavy Flows
  • Free Shipping When You Buy 4
Size chart

Size Chart

For more detailed sizing and measuring help, visit click here.

Size

US Dress Size

Aus Dress Size

Waist Circumference
(inches)

Hip Circumference
(inches)

XS

0

4

24-26

33-36

S

2-4

6-8

26-29

37-39

M

6-8

10-12

30-32

39-41

L

10-12

14-16

32-35

42-45

XL

12-14

16-18

36-39

46-48

XXL

14-16

18-20

39-43

48-51

XXXL

18-20

22-24

43-57

51-55

 
$34.00
/
Shipping calculated at checkout.
Size

Ethically made with PFAS-free material for your comfort & safety.

Here are the full details:

Lining: 95% organic cotton, 5% spandex | Outer Layer: 95% natural bamboo, 5% spandex | Inner Core: 80% polyester, 20% nylon with breathable PUL.

For more information about our fabric choices, click here.

After wearing, rinse in cool water until it runs clear, then machine wash at a low temperature.

Don't use softener or bleach. Hang or lay flat to dry. Discover our best tips and hacks here.

We offer a 30-day hassle-free return policy from the date you receive your order.

For first-time customers, we also offer a free size exchange - because we get that online sizing can be tricky.

To start a return or request an exchange, drop us a line at hello@friperiod.com with your order number, the item(s) you’d like to return or exchange, and why - your feedback helps us do better.

Supply chain transparency means knowing exactly where our products come from and how they’re made, giving you peace of mind with your purchase.

At Fri Period, we believe that ethical production and responsible sourcing are a non-negotiable, ensuring that each pair of period underwear aligns with our commitment to sustainability and social impact.

We partner with a factory in China that meets the highest standards of testing and certification.

This factory is committed not only to quality, sustainable and ethical production, but also to supporting menstrual equity, actively working to reduce period poverty.

Each pair of Fri Period underwear is made with care, in a certified facility that shares our values of transparency and fair labor practices.

New to period underwear? You probably have questions! We've answered the most popular ones right here.

Still unsure? Reach out to us at hello@friperiod.com and we will get back to you as soon as we can! 🩷

Free Shipping

When You Buy 4

Fast Delivery

Orders packed in 1-2 business days

Hassle-Free Returns

30-day peace of mind

5 Star Reviews

Thousands of happy periods

Goodbye Leaks, Hello Comfort

These super soft beauties give you maximum coverage and confidence — whether you're lounging at home, running errands, or catching up on sleep during your heaviest days.

Award-Winning Period Boxers

  • Ultimate Comfort: Made with breathable bamboo and organic cotton blend, perfect for those who care what they put on their skin. No harsh chemicals here!

  • Serious Leak Protection: Our built-in multi-layer absorbent technology holds up to 4 regular tampons' worth of fluid— that's serious heavy absorbency.

  • Sustainable & Stylish: Each pair can save hundreds of disposable products from ending up on landfill. Hello planet-friendly period!

These period boxers are a game-changer for heavy flow days, overnight protection, or when you just want that extra coverage. With a comfy fit and discreet design, they're your go-to for leakproof panties that feel just like regular underwear — no bulkiness, no stress, just peace of mind and all-day confidence.

Ready to Try the Comfiest Period Protection Ever?

Breathable fabric ensures your comfort

Printed gusset

Printed gusset eliminates stain stress

Icon showing Fri Period underwear is made without using PFAS

Made without using PFAS or other nasties

Moderate to heavy flow

Machine washable

You may also love

Customer Reviews

Based on 3 reviews
100%
(3)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
M
Michala Z.
Amazing!!

I bought these after my favorite organic cotton pads were discontinued. I struggled to find a replacement that was comfortable and didn't leak. I finally got tired experiencing leaks from pads shifting and crinkling. After a ton of research, I finally came across these. I knew I wanted a boxer style for overnight. These were one of the only brands I found that actually used cotton in the gusset, which was very important in my search (no polyester for me, thank you). I absolutely LOVE these. I have been converted. I really worried that these would feel bulky or damp, but I really just feel like I'm wearing comfortable underwear. They are so much more comfortable than pads and feel much more secure. I highly, highly recommend! I even stayed up late doing a load of laundry because I only had two pairs and wanted to wear them again. I will definitely be ordering at least two more pairs and likely also getting the regular panty style.

The only thing I would mention is the elastic was a bit tight on my during the first day of my cycle when I was bloated, but I'm not sure if there's any way that could be remedied other than sizing up (which I didn't want to do because I wanted to ensure they were snug everywhere else). Otherwise, I have no complaints!

A
Amber Hardin
Extremely comfortable, seems plenty absorbent.

I've only had to use these once so far so hopefully I'm not jumping the gun on a 5 star review...my last cycle wasn't quite as heavy as usual...HOWEVER, the absorption seemed VERY good. Usually after a whole day of wearing my thinx, while they absorb pretty good, I tend to leak out the sides a bit. The gussets in my thinx don't do a great job of keeping fluids directed away from the clothes you're wearing; I felt like I was constantly transferring blood onto the insides of the pants or shorts I was wearing. I did NOT have that problem once in these.

Also, SUPER comfortable.

I am so happy I gave these a try because so far that are making me a really happy customer.

r
rogelio

Bought this for my female friend because she hated products and she said and i quote “so comfortable love the feeling of freedom not having to worry about when to change a pad or tampon and theres zero smell at all” so if you were thinking about buying DO IT 100/10 definitely buying more