Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
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What is bikini style underwear?
The bikini undies by Proof feature a mid-rise fit, high cut leg opening, and moderate back coverage, all in a comfortable stretch fabric that moves with your body.
What is the difference between brief and bikini underwear?
The bikini features a high-leg opening and narrow sides, with a mid-rise and moderate back coverage. The brief is designed with wider sides, lower rise, and moderate back coverage.
What type of leaks are these undies best for?
This style is moisture-wicking, and comfortable for super light periods, discharge, and sweat.
Is this underwear moisture wicking?
Our underwear helps wick moisture away from the body.
How to choose the size right for you:
Your hip and waist measurements are the most important size when finding the perfect fit. If your measurements fall into different size categories, your hip measurement will be most accurate. Follow our size guide to match your measurements with the right size listed on the chart.
Is this leakproof undie available in plus sizes?
Yes, all our styles of leakproof underwear are available through 3XL. Proof offers plus size period underwear in the following measurements:
Can I sleep while wearing these undies?
Yes, you can wear our leak-resistant undies overnight.
Do I need to wear a panty liner with this undie?
It’s up to you! Some women choose to wear the Proof Everyday Bikini as back up, or you can wear the undie solo on light spotting days. The Everyday Bikini absorbs up to 1 light tampon worth of flow to help you feel confident.
Our Patented Leak-Loc® technology helps lock in leaks
learn more
Our Patented Leak-Loc® technology helps lock in leaks
learn more
Our Patented Leak-Loc® technology helps lock in leaks
learn more
Our Patented Leak-Loc® technology helps lock in leaks
learn more
Our Patented Leak-Loc® technology helps lock in leaks
learn more
Our Patented Leak-Loc® technology helps lock in leaks
learn more
Our Patented Leak-Loc® technology helps lock in leaks
learn more
Our Patented Leak-Loc® technology helps lock in leaks
learn more
sizing guide
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.