Regular price

everyday bikini

Regular price Sale price $25 USD

Buy 4+ and save 20%

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Regular price

everyday bikini

Regular price Sale price $25 USD

Buy 4+ and save 20%

super-light Absorbency holds up to 1 light tampon

Color Black
HSA/FSA Approved

Free Shipping Icon Free shipping on orders $50+

60 Day Money-Back Guarantee


The Leak-Resistant Everyday Bikini Period Underwear pairs invisible protection with a classic low-rise cut. The ultra-soft, stretchy fabric hugs the body, while seamless edges minimize panty lines. The absorbent core acts as an alternative to a panty liner, making it perfect for light days (or any time of the month). It's where a comfortable, everyday staple meets leak-resistant protection.


Absorbs light spotting, sweat, and discharge Features a low-rise cut with seamless edges Can be used as a panty liner alternative or to back up a tampon or cup Washer friendly, hang to dry


Outer: 75% Nylon 25% Spandex 
Top Lining: 100% Cotton
Interlining: 95% Cotton 5% Spandex
Bottom Lining: 100% Polyester

Care Instructions:
Reusable & machine washable: When you're done wearing, simply wash with cold water and gentle detergent, then hang or lay flat to dry


Absorbent Zone; Regular
Center lining protection with absorbent multi-layer core

  • moisture-wicking top layer
  • absorbent core
  • waterproof liner
  • 4-way stretch outer fabric
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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:

  • 2XL — US size 20–22 with 47–50" hips and 37–40" waist
  • 3XL — US size 24–26 with 50–54" hips and 40–44" waist

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.