Bundle 3+ and save up to 20%!
Undies built for *that time* of the month - or any time. Buttery-soft, breathable fabric featuring targeted compression to ease period discomfort and smooth bloating. Bonded edges make these undies invisible under clothes to help you look and feel your best, while a thin leak-resistant gusset keeps you protected.
The High Waisted Smoothing Brief features an invisible leak resistant lining in the gusset. Our lining is thin and breathable for all-day comfort.
Replace a Panty Liner
Outer: 75% Nylon, 25% Spandex
Lining: 100% Cotton
Lining: 100% Polyester
Lining: 69% Cotton, 25% Polyester, 6% Acrylate
See all FAQs
What does compression underwear do?
Smoothing compression underwear by Proof provides leak protection and tummy-smoothing compression in one. Super soft, stretch fabric pulls you in and smooths you out in all the right places. With sleek bonded edges, this pair helps to provide a flawless look under clothing.
Will this undie help minimize discomfort due to period bloating?
Compression can help to ease pain and cramping by helping to increase blood circulation and relax muscles, as well as pulling in excess bloating for a smooth, sleek look under clothing. How’s that for a win-win?
How absorbent is the high waisted smoothing brief?
The high waisted smoothing brief by Proof can hold up to 1 light tampon or a panty liner, making it a perfect replacement for panty liners to eliminate light leaks.
Is the smoothing brief good for postpartum healing?
Lochia, or postpartum bleeding, can last for up to 6 weeks. The Hipster by Proof is an excellent choice for post-delivery bleeding, as it can hold up to 5 tampons or 10 tsp of liquid while providing move-with-you stretch fabric. The High Waisted Smoothing Brief is excellent for later on in your delivery recovery when bleeding has tapered off and you need only light protection, but still want a higher rise fit with built-in compression.
Proof’s patented Leak-Loc™ technology protects against all of life’s leaks, both big and small. Our undies hold up to 10 teaspoons (that’s 5 full tampons worth!) of liquid. We craft our pairs with rigorously-tested materials, to ensure the highest quality care *down there*.
This is really (really) leakproof underwear
Invisible protection for life's little leaks
Eliminate panty lines and light leaks
Travel laundry woes, begone.
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.