Adjustable Absorbency
Clearance BOOST Bikini
Clearance BOOST Bikini
Details
Details
Includes a bonus absorbency booster for heavy days. Tuck ends into pockets & bleed on.
Absorbency
Absorbency
Holds 8+ tampons worth with our booster. Let the crimson wave flow.
Materials
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.

Underwear Size Guide
Standing with your feet together, wrap a soft measuring tape around the widest part of your lower hip. If you're between sizes, we recommend sizing down.
| Hip | Waist | Size | |
| XXS | 33-34" | 23-24" | Y14-00 |
| XS | 35-36" | 24-25" | 0-2 |
| S | 37-38" | 26-27" | 4-6 |
| M | 39-40" | 27-29" | 8-10 |
| L | 41-42" | 30-32" | 12-14 |
| XL | 43-44" | 33-35" | 16-18 |
| 1X | 44-46" | 37-39" | 16-18 |
| 2X | 48-50" | 41-43" | 20-22 |
| 3X | 52-54" | 45-47" | 24-26 |
| 4X | 56-58" | 49-51" | 28-30 |
| 5X | 60-62" | 53-55" | 32-34 |
See it in your size
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!
FAQ
How do your period undies work?
Our specially engineered lining combines super-absorbent Truetex™ technology with a leak-proof lining that absorb 4 tampons worth of fluid. Use the removable booster for an additional 4 tampons of absorbency.
Do Aisle undies contain PFAS?
<b>No detectable levels of PFAS</b> 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 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?
Our undies 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. Hang to dry where possible - it saves energy and prolongs the life of your undies!
An essential! Previously a lifelong tampon/cup user, because i don’t like the feel of a pad, these are essentials to me now
Nice coverage front and back. I have a pretty heavy flow and it hasn't leaked through the extra cloth pad yet. Very comfortable.
Insanely comfortable and really effective even with high flow. These are a game changer!!
Love using these for overnights on heavy days paired with a menstrual cup. I sized up from the suggested size as I don't like too skimpy a fit and I'm always weary of shrinkage in the wash/dry. Happy with my choice.
Snug but still comfy. My flow is very heavy for days so having a booster option and it fitting snuggly makes me less worried about leaks. This underwear feels like quality compared to period underwear I bought that is thin. So it will show through in leggings but better that than my period has every time with the thin ones. I'm also relieved it doesn't have pfas.