Leakproof Thong

This comfortable, machine-washable thong underwear features patented leakproof technology that absorbs up to 1 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 4.7 out of 5
Based on 818 reviews
  • 5 Stars
    651 Reviews
  • 4 Stars
    125 Reviews
  • 3 Stars
    27 Reviews
  • 2 Stars
    9 Reviews
  • 1 Star
    6 Reviews
96% 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
818 Reviews
Reviewed by Suzanne A.
Verified Buyer
Leakproof Thong
Reviewing
Leakproof Thong
I recommend this product
Pant Size
10
Size Purchased
L
Usage
Light Bladder Leaks
Rated 5 out of 5
Review posted

Love these!

I think I now have more than 10 pairs of these leak-proof thongs and I love them! I am a middle-aged, menopausal woman. These have been a game changer for me. I wish the new colours didn’t sell out so fast - and I wish that the “nudes” were more colour-inclusive for my POC sisters. Otherwise, perfect!

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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?
Reviewed by Chelsea J.
Verified Buyer
Leakproof Thong
Reviewing
Leakproof Thong
I recommend this product
Pant Size
4
Size Purchased
S
Usage
Period Back-Up
Rated 5 out of 5
Review posted

These are great

These leak proof panties are non carcinogenic, comfort and prevent leaking which makes them great.

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Comfort
Rated 4 out of 5
Effectiveness
Rated 4 out of 5
Sizing
Rated -1 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?
Reviewed by Valerie M.
Verified Buyer
Leakproof Thong
Reviewing
Leakproof Thong
I recommend this product
Pant Size
6
Size Purchased
S
Usage
Sweat
Rated 5 out of 5
Review posted

Love love ❤️

Very comfortable. Favourite underwear brand for training

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Comfort
Rated 3 out of 5
Effectiveness
Rated 3 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?
Reviewed by Tanya D.
Verified Buyer
Leakproof Thong
Reviewing
Leakproof Thong
I recommend this product
Pant Size
14
Size Purchased
XL
Usage
Light Bladder Leaks
Rated 5 out of 5
Review posted

Love the thong!

Love the fit of the thong! Super comfy!

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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?