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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. Our manufacturing is OEKO-TEX certified, Prop 65 compliant, and each undie is successfully tested for harmful substances to be body safe.

Frequently Asked Questions

Can I wear these overnight?

Yes! Our moisture wicking lining draws liquid into the ultra-absorbent core. Our patented Leak-Loc™ protection ensures that no leaks escape, even while you snooze.

Are these machine washable?

Yes! All Proof undies offer strong protection, but should be washed gently. Machine wash on gentle using cold water and gentle detergent, and hang or lay flat to dry.

Can these replace pads and tampons?

The Hipster is an excellent replacement for traditional period disposables. By switching to Proof, you can help to reduce single-use plastic waste. This is because the Hipster holds up to 10 teaspoons (that’s 5 tampons worth!) of liquid.

Are these suitable for postpartum recovery?

Yes! Give yourself an upgrade from disposable hospital underwear after having your baby. The Hipster can hold 10 teaspoons -- 5 tampons worth -- of liquid without added bulk.