Super Leakproof Thong

Introducing our most absorbent thong underwear ever - up to 6 tampons worth! Switch from relying on disposable products to wearing incredibly comfortable and machine-washable underwear.

Please note: All underwear are final sale

Super Leakproof Essential

Leakproof Protection
Our state-of-the-art fabric can absorb up to 6 tsp of liquid and stop it from leaking through.
Conforms to Your Body
Adaptive 4-way stretch material that relaxes with wash and wear for a perfect fit.
Makes Less Waste
Total protection on your heaviest days so you don't have to rely on disposables anymore!

Knix Leakproof Period Underwear FAQs

Super Leakproof Technology
average rating 4.6 out of 5
Based on 105 reviews
  • 5 Stars
    79 Reviews
  • 4 Stars
    17 Reviews
  • 3 Stars
    4 Reviews
  • 2 Stars
    4 Reviews
  • 1 Star
    1 Review
92% 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
105 Reviews
Reviewed by Stephanie G.
Verified Buyer
I recommend this product
Pant Size
4
Size Purchased
S
Usage
Light Bladder Leaks
Rated 5 out of 5
Review posted

Changed my life!!

These products have changed my life and the way I workout! For the first time since having my second child (6 years ago), I can do jumping jacks with confidence! Thank you so much!

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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 Meghan Y.
Verified Buyer
I recommend this product
Pant Size
8
Size Purchased
M
Usage
Primary Period Protection
Rated 5 out of 5
Review posted

Love it!

I loved it so much, I bought 4 more pairs!!

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Comfort
Rated 4 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 Jessica G.
Verified Buyer
I recommend this product
Pant Size
6
Size Purchased
M
Usage
Primary Period Protection
Rated 5 out of 5
Review posted

Game Changer

This was my first time ordering leakproof underwear, and I’m glad I went with Knix. They are knowledge, friendly and the customer service can’t be beat. The super leak proof thong was great for the last couple days of my cycle

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Comfort
Rated 4 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 Tina V.
Verified Buyer
I recommend this product
Pant Size
6
Size Purchased
S
Usage
Light Bladder Leaks
Rated 5 out of 5
Review posted

Perfect purchase!

Not sure if I'd like the thong at my age, but really comfortable. So much so that I bought 3 more during Black Friday. They're thongs, but as far as thongs go - super comfy.

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Comfort
Rated 4 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 Lucy G.
Verified Buyer
I recommend this product
Pant Size
4
Size Purchased
S
Usage
Light Bladder Leaks
Rated 5 out of 5
Review posted

Super Leakproof Thong

Perfect for running - gives me confidence to go the extra mile!

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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