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BOOST Brief

Adjustable / Black / XS
$50.00 USD
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  • BOOST Brief
BOOST Brief

BOOST Brief

$50.00 USD

Buy 5 Get 2 Free
  • Absorbs 4-8 regular tampons
  • Adjust absorbency with BOOSTER™
  • Machine washable

Savings per wear: $4 | based on 8 tampons
Absorbency
ColorBlack

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 up.

Hip Size
XXS 33-34" Y14-00
XS 35-36" 0-2
S 37-38" 4-6
M 39-40" 8-10
L 41-42" 12-14
XL 43-44" 16-18
1X 44-46" 16-18
2X 48-50" 20-22
3X 52-54" 24-26
4X 56-58" 28-30
5X 60-62" 32-34


Pay with HSA/FSA at checkout

OEKO-TEX® certified

PFAS-Free

B-Corp certified

Fit & Feel

Best For

Easy refresh
Value for money
Light to heavy flows
Overnight

Fit + Coverage

High rise

Absorbency
4 Tampons Adjustable 8 Tampons
Materials

BODY: 48% TENCEL™ lyocell, 48% organic cotton, 4% spandex
GUSSET: 86% recycled polyester, 14% organic cotton
LEAKPROOF CORE: 88% recycled polyester, 12% organic cotton, 10% TPU
BOOSTER: ​65% recycled polyester, 24% polyester, 11% hemp

Care instructions

Machine wash cold
No fabric softener or bleach
Dry on low heat

BOOST™ Adjustable Absorbency

Protection you can customize

Absorbs 4-8 tampons

Not every day requires the same level of protection. That’s why we developed BOOST™, our adjustable absorbency system.

BOOST™ allows you to customize protection using a removable absorbent BOOSTER™, adding capacity only when you need it.

What is a BOOSTER™

A BOOSTER™ is a removable insert shaped like a pad without wings that is designed to fit into our BOOST™ underwear.

How it works

BOOST™ can be worn with or without a BOOSTER™ for light or heavy coverage.

Adjust absorbency by sliding the removable BOOSTER™ into the front and back openings of the gusset.

How it performs

BOOST™ features our integrated three layer leakproof system to wick fluid away from the body and absorb up to 4 tampons worth of fluid.
Woman sitting on a windowsill holding a mug, wearing a light blue sweatshirt and Aisle period underwear in Espresso.

Why we made it

Adjustable absorbency means better comfort, better performance, and you need fewer products overall.

Performance Perfected

PFAS-Free*

We engineer our leakproof layers without PFAS or other unnecessary chemical treatments—prioritizing material safety, long-term wear, and peace of mind against your skin.

Stitched Not Glued

We use stitched construction, not tape or glue (bonding), to improve durability, reduce stiffness, and withstand 100+ wash and dry cycles. Bonded seams can break down and stretch out in the wash.

OEKO-TEX® certified

Our products are made with OEKO-TEX® certified fabrics free from harmful substances, for breathable comfort, reduced irritation, and safer long-term skin contact.

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