• Fawn
  • Fawn
  • Fawn
  • Fawn
1 16

Adjustable Absorbency

BOOST Boxer

BOOST Boxer

$52.00
$52.00
Sale Sold out
Buy 5 Get 2 Free With Code: 2FREEFORME
Size
Color: Fawn
Use your HSA or FSA when you checkout with Flex

Includes one removable Booster that let's you increase the absorbency on heavy flow days, or dial it back for light flow days. Holds 4 regular tampons without Booster and 8 regular tampons with a Booster. 

Details

● Best for heavy flow and long hours thanks to our easy swap Booster
● Made with a buttery soft blend of TENCEL™ and organic cotton for an ultra comfortable feel
● Holds up to 8 regular tampons with Booster
● Machine washable and dryer safe
● B Corp Certified sustainable and ethically made
● Leakproof, breathable, and PFAS-free (no detectable levels up to 1PPM)
● Sales Tax Free in Canada
● FSA/HSA accepted at checkout in US

How Do Period Underwear Work?

Period/leakproof underwear works by using a combination of absorbent and waterproof layers to trap and lock in menstrual flow. The top layer wicks away moisture and keeps you dry, while the inner layers absorb liquid and the leakproof layer prevents leaks. Designed for comfort and performance, Aisle period underwear can be worn alone or as backup for other period products.

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
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BOOSTED

Each pair of Aisle Boost underwear can hold up to 4 tampons’ worth of flow on its own, plus 4 more with the removable booster. For heavy flow, just tuck in the Booster and swap it out as needed. No more mid-day undie changes!

Customer Reviews

Based on 854 reviews
68%
(581)
18%
(152)
9%
(75)
3%
(26)
2%
(20)
K
Kathryn K.
Awesome!

Love these! Very effective and love the fun colours!

B
B.J.

These are the absolute best! I’ve been using different styles and brands for years and I am so glad I found this one! Trust me, it’s worth it!

J
Jessica R.
YAS!!!

Just buy the damn thing.

M
Maja
SICK, ABSOLUTELY AMAZING

When I tell you I RAN to write this review!!!
I already had the Super boxers and decided to get the Booster ones and they’re EVEN BETTER. Longer thigh coverage than the super and they just look and feel incredible, I’m speechless!
The adjustable absorbancy is great as well and makes them so versatile.
I’m so happy these are the first period underwear I’ve tried, they are life changing honestly. 5 stars to customer service as well, always great. Thank you so much, Aisle!!!!

S
Sebi R.
Fantastic!!

I love my booster boxers, they’re really comfortable. I used to have thinx underwear but switched because these are free from toxic chemicals, and look much more durable than the thinx underwear I used to have. I love these!

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FAQ

How does the Booster work?

Boosters allow you to customize the absorbency of Boost period underwear to meet your needs. They also allow you to refresh your period protection throughout the day, without changing your underwear.

On light flow days, wear Boost undies without the Booster for 4 tampons worth of protection.

On heavy flow days, tuck a Booster into the slits at each end of the gusset, and swap them out throughout the day for 8 tampons worth of protection.

Do your period underwear contain PFAS?

We do not add PFAS to any of our products. In addition to using OEKO-TEX certified materials, which are tested for the presence of PFAS, we also conduct additional third-party tests. No detectable levels of PFAS have been found in our underwear, based on a detectable limit of one part per million.

Do I need to wear a pad or tampon with Boost period underwear?

Nope! Boost undies were built to completely replace pads and tampons. Just swap out the Booster as needed throughout the day. Worn without the Booster, they can also be worn as backup protection with a tampon or menstrual cup.

I have heavy flow. Are these the most absorbent period underwear?

Boost undies are adjustable-flow period underwear that can accomodate light to heavy flow, providing up to 8 tampons worth of absorbency. For heavy flow, add the removable Booster and swap it out as needed during the day.

Looking for an all-in-one heavy period undie? Try our Super period underwear.

How do I wash period underwear?

Our period underwear were made to fit into your regular laundry routine. Just rinse the gusset in cool water before washing in the machine with your regular laundry. Avoid the use of fabric softener and bleach, as they can inhibit absorbency and cause the leakproof material to break down. Our undies are dryer safe, but we recommend hanging to dry where possible - it saves energy and prolongs the life of your undies!