Skip to product information
1 of 19

764 total reviews

Aisle

BOOST Boxer

BOOST Boxer

Regular price $52.00
Regular price Sale price $52.00
Sale Sold out
Buy 3+ & save up to 15%
Size
Color: Black
Classic boxer brief with bold statement waistband & full-coverage leak protection.

Details

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

Absorbency

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

Materials

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.

How much fluid do they hold?

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.

Do I need to wear a pad or tampon with them?

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

What does the booster do?

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.

How do I wash my Aisle undies?

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

average rating 4.5 out of 5
Based on 764 reviews
  • 5 Stars
    527 Reviews
  • 4 Stars
    139 Reviews
  • 3 Stars
    60 Reviews
  • 2 Stars
    21 Reviews
  • 1 Star
    17 Reviews
90% 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
764 Reviews
Reviewed by KRISTINA H.
Verified Buyer
BOOST Boxer
Reviewing
BOOST Boxer
I recommend this product
Rated 5 out of 5
Review posted

Great!

Super comfortable and great quality. Adding these as a staple in my wardrobe.

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 Katie A.
Verified Buyer
BOOST Boxer
Reviewing
BOOST Boxer
I recommend this product
Rated 5 out of 5
Review posted

Best period underwear

I’ve been through so many kinds of period underwear and I feel most secure in these ones. They have a long gusset up the front as well as the back and they fit comfortably

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 Naelly
BOOST Boxer
Reviewing
BOOST Boxer
I recommend this product
Rated 5 out of 5
Review posted

5 Stars

The best period underwear! I have such a heavy flow and nothing holds up like these do! They’re so comfortable too that you don’t feel like you have a diaper on! I have purchased 5 and need more for variety! Please make more colors and patterns!

Size reference:

ordered L

I am 5’2 & 135lbs

They fit comfortably!

Loading...
Was this helpful?
Reviewed by Naelly
BOOST Boxer
Reviewing
BOOST Boxer
I recommend this product
Rated 5 out of 5
Review posted

5 Stars

The best period underwear! I have such a heavy flow and nothing holds up like these do! They’re so comfortable too that you don’t feel like you have a diaper on! I have purchased 5 and need more for variety! Please make more colors and patterns!

Size reference:

ordered L

I am 5’2 & 135lbs

They fit comfortably!

Loading...
Was this helpful?
Reviewed by Naelly
BOOST Boxer
Reviewing
BOOST Boxer
I recommend this product
Rated 5 out of 5
Review posted

5 Stars

The best period underwear! I have such a heavy flow and nothing holds up like these do! They’re so comfortable too that you don’t feel like you have a diaper on! I have purchased 5 and need more for variety! Please make more colors and patterns!

Size reference:

ordered L

I am 5’2 & 135lbs

They fit comfortably!

Loading...
Was this helpful?