Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
What is bikini style underwear?
The bikini undies by Proof feature a mid-rise fit, high cut leg opening, and moderate booty 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.
Is this underwear environmentally friendly?
Proof undies are designed to be better for you, and the environment! Single-use plastic period products like tampons and pads end up in landfills and oceans, where they pose a serious threat to wildlife. By switching to Proof, you help to reduce single-use plastic waste.
Do I need panty liners to wear with these undies?
No you don’t! Our underwear comes in varying absorbencies, ranging from super-light to super-heavy –– holding up to 5 regular tampons or 10 teaspoons. The built-in lining increases in coverage from lightest to heaviest. You can, of course, wear a panty liner with any of our leak-proof underwear, but it is not necessary.
What type of leaks are these undies best for?
Our leak-proof underwear is super absorbent, moisture-wicking, and comfortable for a wide range of leaks, including periods, bladder leaks, incontinence, after sex, maternity, postpartum, and sweat.
Is this underwear moisture wicking and odor resistant?
Yes! Our underwear is both moisture wicking and odor resistant to keep you ultra dry and worry-free. Our unique interlock lining wicks away moisture to help keep you feeling dry, and antimicrobial fibers inhibit the growth of bacteria and decrease odor.
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 leak proof underwear available in plus sizes?
Yes, all our styles of leak-proof 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 absolutely wear our leak-proof undies overnight. They are safer and more comfortable than tampons, pads, and cups.
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.