NaN -Infinity

Aisle

BOOST Boxer

BOOST Boxer

$52.00
$52.00
Sale Sold out
Buy 3+ & Save Up to 15%
Size
Color: Espresso
Use your HSA or FSA when you checkout with Flex
Classic boxer brief with bold statement waistband & full-coverage leak protection.

Includes a bonus absorbency booster for heavy days. Tuck ends into pockets & bleed on.

Holds 8+ tampons worth with our booster. Surf that crimson wave.

Body: 48% TENCEL™ lyocell, 48% organic cotton, 4% spandex
Gusset: 90% Truetex™ (88% recycled polyester, 12% organic cotton), 10% TPU
Lining: 86% recycled polyester, 14% organic cotton
Booster: ​65% recycled polyester, 24% polyester, 11% hemp
All materials are OEKTO-TEX certified and lab tested for PFAS. No detectable levels of PFAS to 1 part per million.

  • Made with TENCEL & organic cotton
  • Machine wash & dry safe
  • Replaces 100+ disposable products
View full details

Boost the Absorbency

Each pair of Aisle Boost underwear comes with a removable absorbency booster that adds an extra 4 tampons of absorbency. It's an innovation that sets these period underwear apart from the rest.

For heavy flow-ers there's no need to change your undies part way through the day, just tuck a Booster in and swap it out as needed.

Made with TENCEL™

The fiber that powers our period underwear. One of the most sustainable materials in the world - TENCEL™ Lyocell - is biodegradeable, highly breathable, less susceptible to odour-causing bacterial growth, and absorbs 50% more than cotton.

Our Tech

Featuring Truetex™ Fabric Technology

We developed our own custom blend of materials to create a gusset that's moisture wicking, super absorbent & leakproof without the use of harmful chemical finishes. Our undies keep absorbing, wash after wash after wash.

Learn More

FAQ

How do your period undies work?

Aisle undies feature a specially engineered lining that combines super-absorbent Truetex™ technology with a leak-proof lining to keep you dry and feelin’ fly.

8X as much as a standard disposable! Our undies absorb 4 tampons worth of fluid on their own, or 8 tampons worth when you wear with the included booster.

Nope! Our undies were built to completely replace pads and tampons. They make great backup protection with tampons or menstrual cups, too.

Our undies absorb 4 tampons worth of fluid on their own, but if you need a little extra you can add the optional booster for an extra 4 tampons worth. Just tuck the ends into the slits at either end of the gusset.

It’s not that complicated - our undies were made to fit into your regular laundry routine. Just rinse out in cool water, then wash and dry with your regular laundry. As with any garment, wash with like colors.

Real reviews from real people

Write a Review
average rating 4.5 out of 5
Based on 833 reviews
  • 5 Stars
    567 Reviews
  • 4 Stars
    149 Reviews
  • 3 Stars
    72 Reviews
  • 2 Stars
    26 Reviews
  • 1 Star
    19 Reviews
88% of reviewers would recommend this product to a friend
Absorbency
Rated 4 out of 5
Comfort
Rated 4 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Customer photos and videos
Open user-uploaded photo and review in a modal Open user-uploaded photo and review in a modal Open user-uploaded photo and review in a modal Open user-uploaded photo and review in a modal Open user-uploaded photo and review in a modal Open user-uploaded photo and review in a modal
833 Reviews
Reviewed by Shannon L.
Verified Buyer
BOOST Boxer
Reviewing
BOOST Boxer
I recommend this product
Rated 5 out of 5
Review posted

Works great

This was my first time trying out period underwear. Here's my overall thoughts after using for 2-3 months:

* For heavier days, definitely helps to use the boosters, since those are much easier to change out.

* For lighter days, works great on its own.

* Cleaning & washing/drying is pretty convenient. However, I haven't had to wash/change them outside though, so can't speak to the convenience of that.

* At least in my experience, it's been better than pads. the more comfortable pads didn't provide enough coverage, but the ones that provide more coverage were bulky/uncomfortable to wear for long periods of time

Loading...
Absorbency
Rated 4 out of 5
Comfort
Rated 5 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?
Reviewed by charlotte c.
Verified Buyer
BOOST Boxer
Reviewing
BOOST Boxer
I recommend this product
Flow
Very Heavy
Height
5'11
Hip
45" - 46"
Size
XL
Rated 5 out of 5
Review posted

Love these!

I've used them for 1 period so far, admittedly still using my regular pads. I needed something to help with my days with heavy flow. Totally did the trick! I'm looking forward to getting more familiar with them.

Loading...
Absorbency
Rated 4 out of 5
Comfort
Rated 5 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?
Reviewed by Samantha
Verified Reviewer
BOOST Boxer
Reviewing
BOOST Boxer
I recommend this product
Flow
Heavy
Height
5'5
Size
1X
Rated 5 out of 5
Review posted

LOOOVE

I've only ever used knix brand period underwear before, and I had issues with their undies to begin with, such as the placement of the absorbent material. That's one of the reasons I LOVE these - the "pad" part takes up the whole front & back! Perfect for overnight! Also compared to knix, it remains dry to the touch and so soft! I was so surprised by how much it held without me ever feeling wet or leaking all over my thighs! I love these & will definitely be purchasing more, then keep my knix to use for very light days.

Loading...
Absorbency
Rated 4 out of 5
Comfort
Rated 4 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?
Reviewed by Marie S.
Verified Buyer
BOOST Boxer
Reviewing
BOOST Boxer
I recommend this product
Flow
Moderate
Height
5'7
Hip
35" - 36"
Size
S
Rated 5 out of 5
Review posted

Best underwear, period 😜

I tend to use the Boost underwear on my period, and the Essentials other days. They're just that comfortable. I wish I had a chance to try the Base underwear before they went away.

Loading...
Absorbency
Rated 5 out of 5
Comfort
Rated 5 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?
Reviewed by Agata W.
Verified Buyer
BOOST Boxer
Reviewing
BOOST Boxer
I recommend this product
Flow
Heavy
Height
5'7
Size
M
Rated 5 out of 5
Review posted

Really comfortable

These are really comfortable and look really cute as just shorts as well :)

Loading...
Absorbency
Rated 5 out of 5
Comfort
Rated 5 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?