Leakproof Bikini

This comfortable, machine-washable bikini underwear features patented leakproof technology that absorbs up to 3 tsp of liquid – perfect as backup protection during your cycle’s heavier days, on its own for lighter ones, or for helping you deal with light bladder leaks.

Please note: All underwear are final sale.

Leakproof Essentials

We've harnessed cutting-edge textile technology to give you that extra confidence and comfort you deserve.
Patented Leakproof Tech
Super-absorbent, moisture-wicking, odor-killing, and quick-drying to keep you feeling fresh no matter what.
Conforms to Your Body
Adaptive 4-way stretch material that also relaxes with wash and wear for a perfect fit.
Makes Less Waste
Works great used on its own during light flow days or paired with tampons or menstrual cups during heavier periods.

Knix Leakproof Period Underwear FAQs

Super Leakproof Technology
average rating 4.6 out of 5
Based on 2161 reviews
  • 5 Stars
    1643 Reviews
  • 4 Stars
    344 Reviews
  • 3 Stars
    108 Reviews
  • 2 Stars
    42 Reviews
  • 1 Star
    24 Reviews
93% of reviewers would recommend this product to a friend
Comfort
Rated 4 out of 5
Effectiveness
Rated 4 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Customer photos and videos
2161 Reviews
Reviewed by Laura A.
Verified Buyer
I recommend this product
Pant Size
8
Size Purchased
M
Usage
Period Back-Up
Rated 5 out of 5
Review posted

Great product!

My new Knix leakproof bikini undies are beautiful. More importantly though they function as advertised and are both discreet and comfortable. Would recommend 100% and buy again.

Congrats on this great product.

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Comfort
Rated 5 out of 5
Effectiveness
Rated 5 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
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Reviewed by Amanda L.
Verified Buyer
I recommend this product
Pant Size
2
Size Purchased
S
Usage
Primary Period Protection
Rated 5 out of 5
Review posted

So comfy and absorbent!

I have a light period and was trying to move away from disposable products, so I gave these a try on a whim. I was pleasantly surprised with the low profile of the absorbent pad and how comfortable they fit (I did think they were too tight at first but they have loosened up perfectly). I have quickly converted and ordered myself more pairs so I have enough to last my period! Really happy with these and will probably explore more products in the future.

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Comfort
Rated 5 out of 5
Effectiveness
Rated 5 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
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Reviewed by Veronica B.
Verified Buyer
I recommend this product
Pant Size
2
Size Purchased
S
Usage
Light Bladder Leaks
Rated 5 out of 5
Review posted

They are perfect

They are just perfect, you don't find nothing else in my draw, i clean up and now is just knix

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Comfort
Rated 5 out of 5
Effectiveness
Rated 5 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
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Reviewed by CB21
Verified Buyer
I recommend this product
Pant Size
14
Size Purchased
XL
Usage
Sweat
Rated 5 out of 5
Review posted

Should’ve bought more

Extremely comfortable!

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Comfort
Rated 5 out of 5
Effectiveness
Rated 5 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?