Shopping for someone younger? Proof period undies work for teens, too! Check out our best-selling styles designed to absorb periods and lock-in leaks for worry-free protection.
Absorbent protection for light flows and in-between days that is undie-tectable under clothes
Super smooth, ultra comfy coverage for *that* time of the month
Front-to-back protection built for the heaviest of flows - white sheets have met their match
Proof undies fit and feel like her favorite pair with built-in period protection. Multiple layers of absorbent protection act as a replacement for pads and pantyliners, and can replace or backup tampons and cups. Antimicrobial fibers inhibit the growth of bacteria and fight odor, and moisture-wicking lining provides a fresh, dry feel. After wearing, just pop in the washing machine and air dry, then wear again (and again, and again..)
breathable, buttery-soft fabric moves with you
MULTIPLE LAYERS OF ABSORBENT PROTECTION PULL IN MOISTURE
Leak-Loc™ edges seal in moisture and prevent leakage
quick dry lining wicks away moisture while Antimicrobial fibers fight odor
We’ve meticulously designed the best period underwear for women - and teens can wear them, too! Teens who wear adult sizes can use our size guide to find the best fit for them - shop by absorbency level to suit your flow. With Proof, there’s a perfect pair for everyone.
Period underwear in extended teen + tween sizes, new styles, and more designs are on the way. Want to be the first to know about new Proof teen and Proof tween styles? Sign up to be notified!
60 day leak free guarantee
FREE SHIPPING on all orders OVER $50
With a pair for every flow, you’ll be able to find your Proof™-perfect fit.
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Proof™ provides serious protection from bladder leaks, without added bulk.
Discrete protection with room to accommodate your growing bump.
Designed with new moms in mind, leak protection without the bulk.
Go ahead, break a sweat. Our moisture-wicking fabric also reduces odor.
Undercover protection for every day of the week.
Perfect for daily discharge, Proof™ keeps you fresh and dry.
For in-between days, these undies keep you spotless all day long.
Holds up to 1 Light Tampon or Panty Liner
panty liner replacement
Holds up to 1 Regular Tampon or 2 Teaspoons
light period leaks
Holds up to 3 Regular Tampons or 6 Teaspoons
moderate period leaks
light bladder leaks
replace or back up a tampon, pad, or cup
Holds up to 4 Regular Tampons or 8 Teaspoons
moderate bladder leaks
heavy period leaks
replace a pad
replace or back up a tampon or cup
Holds up to 5 Regular Tampons or 10 Teaspoons
maximum overnight period protection
Your hip and waist measurements are the most important size when finding the perfect fit.
Measure around your body as shown.
Find your waist measure by leaning over to one side. Where your body naturally creases is your where you will place the tape. Measure parallel to the ground.
For your hip measurement, turn to the side and locate the fullest part of your booty. Place the tape around your body, parallel to the floor, around the widest and fullest part of your hips and tush.
If your measurements fall into different size categories, your hip measurement will be most accurate.