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Home / Thong Underwear / Super Leakproof® No-Show Thong - Original
New

Super Leakproof® No-Show Thong - Original

$29.00 USD

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Absorbs about 2.5 regular tampons

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Invisible under clothes

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Perfect for daily wear

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Machine washable

Abigail has 33

Abigail has 33" hips and wears a Knix size XS

Abigail has 33

Abigail has 33" hips and wears a Knix size XS

Abigail has 33

Abigail has 33" hips and wears a Knix size XS

| General
| General

Abigail has 33" hips and wears a Knix size XS

Absorbency: Moderate
Drop
Drop
Drop
Drop
Drop

Color: Black

Size:

True to Size

•

Size:

Size and Fit Guide

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Shipping

HOLIDAY SHIPPING

Give the gift of Knix! To receive your order by Dec 24th, please order by the following dates.

All States - Urban Centers (except Hawaii, Alaska)
Standard: Sunday, December 14
Express: Tuesday, December 17

Alaska, Hawaii & Rural
Standard: Wednesday, December 10
Express: Wednesday, December 10
Express shipping is unavailable for international orders:

Africa, Central/South America, and Caribbean
Standard: Wednesday, December 10

Asia, Australia, and New Zealand 
Standard: Thursday, December 11

Europe and the Middle East 
Standard: Thursday, December 11

United Kingdom, France, Germany, Netherlands, Switzerland, and Japan 
Standard: Monday, December 15

Please note: Weather conditions and carrier issues may cause delays. Delivery dates are not guaranteed.

Processing Time
Please allow 1-2 business days for our warehouse team to pack and ship your order. During peak periods such as sales, holidays and product launches, please allow up to 4 business days for us to process your order.

Delivery Time
For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines vary depending on location and do not include processing times.

Shipping Charges
Orders over $100* USD = Free standard Shipping (4-8 business days)**
Expedited = $4.99 USD (3-6 business days)**

Orders under $100* USD = $7.99 USD Standard Shipping (4-8 days)**
Expedited = $9.99 USD (3-6 business days)**

*After discounts, before shipping and taxes. Processing times not included in estimates.
**Military Addresses Excluded. Standard Military Address Shipping = $10.00 USD (est. varies per location)
Easy Exchanges within 30 Days

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Returns

Free Returns

Knix covers the return shipping fees for exchanges and refunds initiated through our Return & Exchange Portal. Exchange orders initiated through our Return & Exchange portal are also eligible for free shipping within the USA and Canada. Please note, the shipping fees on your original order are non-refundable.

Return Policy

Return policy varies by product, please check if your item is refund or exchange eligible by viewing our full policy here.

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Items discounted below 30% are eligible for size exchange or store credit. Items discounted 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.
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"I genuinely thought my thong days on my period were over. But there I was, rocking my jeans with zero leaks, no worries, and full comfort and confidence."

- Glamour

Comfort-First Fit

Thong style with a mid-rise fit and minimal bum coverage.

Worry-Free Protection

Our newest leakproof innovation provides more absorbency without the bulk. Patented 360 LeakSeal™ technology locks in leaks at every edge.

Moderate Absorbency

Absorbs 2.5 super tampons worth of liquid—perfect for moderate flow days, light bladder leaks, and sweat. The carbon cotton gusset top layer keeps you dry.

No-Show Style

Made from our signature buttery soft fabric with a wide, comfortable waistband. Wear it on its own or under your favorite pajamas.

Easy to Wash

Machine washable just like regular underwear.

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Abigail has 33
Abigail has 33
Abigail has 33
| General
| General

How to Choose?

Essential

Drop
Drop
Drop
Drop
Drop
  • • Everyday Wear
  • • No leakproof protection
  • tsp
    0 tsp

Heavy

Drop
Drop
Drop
Drop
Drop
  • • heavy period days
  • • overnight protection
  • • light bladder leaks
  • tsp
    about 8-14 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 4-7 super tampons
  • cup
    about 1.5-3 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • • light period days
  • • sweat
  • • discharge
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

Drop
Drop
Drop
Drop
Drop
  • • moderate period days
  • • light bladder leaks
  • • sweat
  • tsp
    about 4-8 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-4 super tampons
  • cup
    about 0.5-3 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • • extra heavy period days
  • • overnight protection
  • • light bladder leaks
  • tsp
    about 15-20 tsp
  • pad
    about 1.5-2.5 super pads
  • tampon
    about 7-11 super tampons
  • cup
    about 2-3 menstrual cups
PATENTED LEAKPROOF TECHNOLOGY

Built-in protection that feels like nothing at all

Our original Fresh Fix Technology® features a built-in absorbent liner absorbing about 3-6 super tampons worth of liquid so you feel fresh and in-control.

Soft Top Layer

Soft Top Layer

Gently wicks away moisture while keeping you feeling fresh and odor-free.

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4.4
Rated 4.4 out of 5 stars
Based on 1,835 reviews
Total 5 star reviews: 1.3k Total 4 star reviews: 243 Total 3 star reviews: 107 Total 2 star reviews: 62 Total 1 star reviews: 92
89%would recommend these products
ComfortRated 4.4 on a scale of 1 to 5
EffectivenessRated 4.5 on a scale of 1 to 5
FitRated -0.1 on a scale of minus 2 to 2
Ease of UseRated 4.3 on a scale of 1 to 5
Write a Review (Opens in a new window)
1,835 reviews
  • Rated 4 out of 5 stars
    3 days ago
    Great for any leakage

    Make me feel protected when I’m at work. Haven’t leaked at all during my period. They are a bit snug on me but the large will be too big on me

    Amy M.
    Verified Buyer
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  • Rated 5 out of 5 stars
    1 week ago
    Get them!

    I had been holding off on getting these because of the price. A friend told me about them because while we were playing a fun adult game of soccer I had tinkled a bit in my underwear:( I’m 42 and have given birth so things are not like they used to be.

    I bought 3 pairs and my period had started the day they were delivered. I figured I would try them out during my cycle because I hate wearing full bottom underwear. The thongs were amazing and I never leaked once! I ordered 4 more pairs during a Black Friday sale. After my menstrual cycle I played a game of coed flag football. I wore my Knix and was not worried at all! Just a little accidental urine and no leaking! I no longer have to worry or be embarrassed. Thank you Knix!

    Tara H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    Comfortable and truly outfit saving. Even wore under leggings and it wasn’t apparent they were any different than a normal pair.

    Elisa
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    Comfortable and truly outfit saving. Even wore under leggings and it wasn’t apparent they were any different than a normal pair.

    Elisa
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    Love them

    Rochelle
    Was this helpful?
  • Rated 4 out of 5 stars
    2 weeks ago
    Great except the new sewn in tag

    I love all Knix underwear but I was surprised and not thrilled with new scratchy sewn in tags that I now have to cut out and risk ripping the seam. Why did that change?

    Jennifer R.
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    3 weeks ago
    Poor fit

    I wish these fit. They are too big. Especially in the crotch gusset making them super uncomfortable. I wear a M but these are way to wide. Now I have $100+ in underwear that doesn't fit, and can't return because they've been washed.

    E
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 weeks ago
    Amazingly Leakproof!!

    I love allll my knix products and this Leakproof thong is perfect when you want to make sure your period underwear don't show through a cute outfit! 1000000/10 highly recommend!!!

    Lauren D.
    Verified Buyer
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  • Rated 5 out of 5 stars
    1 month ago
    Super leakproof no show Thong

    The large size was too loose - size medium fits better - a tad tight.

    Sharon M.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    1 month ago
    Great product, but….

    I love Knix underwear, especially the thongs and bikini style. The only reason why I gave this a 3 star rating instead of 5 star is because even though I ordered the super leakproof I received medium leakproof instead.

    Cassandra F.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    2 years and counting

    I got my first few pairs of these undies about 2 years ago, out of about 10 pairs bought I’ve just thrown out 2 pairs for coming apart but I’ve worn them almost once a week, it’s more for ‘sneeze & pre’ situations for me over periods but they have been great for me and I’m reordering now!

    Sure would be nice to get a discount for repeat customers though!

    Denise D.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    1 month ago
    What happened to the beautiful colors?

    I am a 68 year-old woman that has been wearing you guys thongs for a while. When I click on the link to purchase more. Showing more beautiful colors until you go to the super leakproof there are only 5 basic colors to choose from. Please change this for medium as well as super.

    Berneta
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