Leakproof Essential Brief (Heavy)

Regular price $35 Sale price$25 Save $10

Buy 3+ and save 20%

Leakproof Essential Brief Period Underwear | Heavy

Regular price $35 Sale price$25 Save $10

Buy 3+ and save 20%

Heavy duty protection for the ultimate in confidence
HSA/FSA Approved

heavy AbsorbencyHolds up to 4 regular tampons


HSA/FSA Approved

Free shipping on orders $50+

60 Day Money-Back Guarantee

Absorbent Core

Extended Protection

Machine Washable

Our Leakproof Essential Period Brief features a classic fit with moderate coverage and will become your new go-to, everyday style. With heavy absorbency, these undies help draw moisture away from the body with our patented, multi-layer Leak-Loc® technology. A super absorbent style for those heavy days, without sacrificing comfort. It's simple—make the switch.
  • Heavy periods
  • Moderate bladder leaks
  • Pad alternative
  • Alternative/back up a tampon or cup
  • Discharge
  • Sweat
  • Fights odor

Outer: 75% Nylon, 25% Spandex
Top Lining: 100% Polyester
Inner Lining: 70% Polyester, 30% Cotton
Bottom Lining: 100% Polyester


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
Multi-layer leakproof absorbent core
Leak-Loc® bonded edge technology

  • Moisture-wicking top layer
  • Absorbent core
  • Waterproof liner
  • Water-resistant outer fabric

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There are 3 levels of absorbency offered in our washable Proof Essentials Briefs - The Leakproof Brief in Heavy absorbency is great for those who need that extra level of protection. Great for overnight period and leak protection, use either as a replacement or back up to pads, tampons or cups. The classic brief cut provides a little extra coverage and best of all, the super slim absorbent lining is perfectly comfortable for everyday wear, these look and feel just like regular undies.

Our Proof Essentials collection comes in bucket sizing giving you the size flexibility you need for THAT time of the month - hello comfort! The essential brief comes in 3 levels of absorbency up to heavy leak protection but without the full lining, making it the perfect go-to style for everyday wear! For more guidance, check out our absorbency chart and size guide.

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