Skip to product information
1 of 6

The Boxer Brief

The Boxer Brief

*please allow up to 2 weeks for shipping*

Regular price $25.00 USD
Regular price $25.00 USD Sale price $25.00 USD
Sale Sold out
Shipping calculated at checkout.
Select a size
Select a color
Find my size

A comfy, mid to high-rise boxer brief made from super soft recycled nylon. Our machine-washable boxer brief period underwear is engineered for regular or light flow days, ideal as a standalone solution or reliable backup for heavy flow days. 

(psst.. we've made some really cool updates to the boxer brief like: an extended gusset, a pad shaped gusset to allow more absorbency and comfort, and a softer waistband)

Product Details + Fit

This style was made to stretch. Recycled nylon and a forgiving waistband make these perfect for people that experience bloating or heavy cramping–or that just want a lil' extra comfort on their period. They fit true to size, so we recommend ordering your usual size (if you're in between sizes, size up!)

Fabric + Care

  • Shell: 88% Recycled Nylon, 12% Spandex
  • Lining: 100% Cotton
  • Gusset: 75% Bamboo, 25% Polyester

monthly period underwear are machine washable. Wash on cold with like colors. Hang to dry. It's that simple!

Impact

Switching to period underwear helps divert 4 tampons/pads from landfills every day you choose to use them! (not to mention they save you $ in the long term.) Good for you + good for the planet.

Design

We talked to 250+ people with periods before designing our underwear. These folks had heavy flows, light flows, endo, PCOS, gender dysphoria, cramping, and everything in between. Based on these conversations and surveys, here's what we did:

  • Made an ultra stretchy waistband so you don't feel restricted while bloating
  • Full length boxer to allow for gender inclusion
  • Floating gusset so you can wrap a pad inside the underwear in case of emergency or preference
  • Ultra thin pad, so they feel just like your favorite pair of underwear

Trust us, we got your back when it comes to periods. All day comfort informed by real people with real periods. ☁️

FAQ's

Still need some more info on our underwear? Check out our FAQs page or shoot as an email at hi@shopmonthly.co.

View full details

Planet-friendly

✸

ultra comfy

✸

low waste

✸

Gender-inclusive

✸

It's the absorbency for me

Our multi-layered gusset features a cotton top, two layers of absorbing bamboo blend fabric, and a breathable leakproof backing.

  • Odor-resistant

    Designed to keep you fresh with a cotton layer and bamboo blend for natural odor control

  • Leak-proof

    Our 4-layer gusset is ultra thin, but designed to absorb your flow and prevent leakage

  • Absorbent

    Our boxer brief holds about 25 ml of flow, which is equal to 1 menstrual cup, 3 super tampons, or 5 pads. 

  • Super stretchy

    Ultra stretchy waistband and fabric that adapts to your body, offering a flexible fit that moves with you

Don't just take our word for it

This is my first time trying period underwear and I actually am obsessed, this changed the game!

-Rebe

These are so comfortable, I wear these even when I'm not on my period!

-Olivia

I've had my monthlies for about a year now, and I absolutely love them!

-Delilah

Wearing comfortable, cute, period undies helps you feel better

-Ada

I thought that menstrual underwear was the best it was going to get... until I tried monthly

-Peaches

monthly underwear helps me feel more confident in my body

-Aeja

Our customers are raving

✸

Our customers are raving

✸

Our customers are raving

✸

Real reviews from real people

4.2
Rated 4.2 out of 5 stars
Based on 128 reviews
Slide 1 selected
77%would recommend this product
128 reviews
  • A Profile picture for Annagoogle logo
    Anna
    Verified Buyer
    I recommend this product
    Age (optional) 18-24
    Products You Use for Period Management Pads
    Flow Level Light
    Why did you switch to monthly? Gender Affirming, Comfortable
    Rated 5 out of 5 stars
    1 week ago
    Excellent Period Boxers!

    The boxers made me forget I'm on my period. I love them! The boxers came within a week which was so much quicker than I expected and made me very happy. I thought the packaging was simple and cute too. As for the actual boxers, at first I thought the material felt cold since I'm used to wearing a softer kind of boxers but when I put them on I could barely remember they're there! They're so soft. The waistband is a little high for me but I rolled it down once and that fixed the issue. As for the period function, so far I've only wore it on its own without an additional pad and on the end of my period but it's worked fairly well. I had some blood go on an area outside of the pad portion of the boxers but I think that's more due to my carelessness and not being used to the boxers yet rather than the boxers being bad. I can definitely tell that there's a small pad in the boxers but I would've had to deal with that anyways had I had on a pad. Also, I love the matcha checker print and the fact that they're boxers!

  • PH
    Pink H.
    Verified Buyer
    I recommend this product
    Age (optional) 18-24
    Products You Use for Period Management Period Underwear
    Flow Level Light
    Why did you switch to monthly? Gender Affirming, Comfortable, Sustainable/Reusable, Convenient, Easier to Use
    Rated 5 out of 5 stars
    2 weeks ago
    Love them and love the ethos of this brand!

    I dont get my period very often or very heavy but i love my monthly briefs for when i do get it! As a trans guy they are so nice to just throw on and forget about my period but also when im travelling, instead of worrying about pads, i just throw a pair in my rucksack as a just in case, very discreet!

  • V
    Vape
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    5 Stars

    Hiya! I've fallen for the matcha checker propaganda and they are insanely comfy for me, as well as stylish 🥺❤️ when they came in I had a severe dislike for the waistband (it was comfy, just really tight and uncomfortable where it rested near my navel and sometimes a little higher)

    But stretching the waistband forwards a bit did the trick and gave me enough room for my bloated tumtum. It's insanely comfy (in case you didn't hear me say that part yet) and is absolutely body tea when it's tried on

    Already ordered another pair and the heavy version of this for the extra security. All in all, this is a great boxer brief I happened to come across randomly on my Instagram page, and I do not regret giving these a try! ❤️

  • CJ
    Courtney J.
    Verified Buyer
    I recommend this product
    Age (optional) 31-42
    Products You Use for Period Management Disc
    Flow Level Moderate
    Why did you switch to monthly? Other
    Rated 5 out of 5 stars
    2 months ago
    Never thought I would I love period underwear

    Editing my review because below it ask me 'why' I switched to period underwear....well it was my husband actually.

    He went to college with the owner of Monthly. He simply wanted to support a small female owned business and bought me a pair to try. I was willing to give them a shot but wasn't very optimistic. I had tried period underwear before and never liked them.

    After the first use of monthly underwear I immediately bought a second pair. The fabric is so so SO soft. I love these to sleep in and feel like my heavy days are so much more comfortable. I can't believe how much I love this product.

    The first pair fit true to size and comfortably, but for my second pair I did size up one size. I wanted my second pair to have extra room for my most bloated uncomfy days. I like having both size options for when I want more room in the waistband.

    I will be buying more pairs and im glad my husband introduced me to something that makes my period more comfortable.

  • AS
    alexandra s.
    Verified Buyer
    I recommend this product
    Age (optional) 25-30
    Products You Use for Period Management Reusable Pads, Period Cup, Period Underwear
    Flow Level Moderate
    Why did you switch to monthly? Sustainable/Reusable, Gender Affirming, Comfortable
    Rated 5 out of 5 stars
    3 months ago
    super comfy and sensory friendly!!!!

    i love these boxers so much. they’re super comfortable even on days when i’m bloated! the fabric is lightweight and super stretchy. my stomach is sensitive and i really don’t like tight things and even the waistband on these is really comfy. for reference im a 32” waist and bought a size large. the pad part is lightweight and doesn’t feel bulky, which can be an issue for me. i was a little nervous at first because the absorbent part is narrower than period undies i’ve had before, but was pleasantly surprised and it stays where it’s supposed to be. i typically wear these while wearing a menstrual cup and haven’t tried them solo on my heaviest days yet. i also love the colorways, that everything comes in curbside recyclable packaging, and that the descriptions and marketing are gender neutral!!!! i bought one pair to try them out first and then quickly ordered 3 more :)