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Light Leakproof UltraThin No-Show Thong

$27.00 USD

Buy 3+ Save 15%, Buy 5+ Save 20%

Absorbs about 2 regular tampons

Invisible under clothes

More absorbency without bulk

Machine washable

Ashley has 39“ hips wearing KNIX S

Ashley has 39“ hips wearing KNIX S

Ashley has 39“ hips wearing KNIX S

Color: Shimmer Cherry Limited Edition

Size:

True to Size

Size:

Size and Fit Guide

Build Your 3-Pack

Light Leakproof UltraThin No-Show Thong

Color: Shimmer Cherry Limited Edition

Size:

Size:

Light Leakproof UltraThin No-Show Thong

Color: Shimmer Cherry Limited Edition

Size:

Size:

Light Leakproof UltraThin No-Show Thong

Color: Shimmer Cherry Limited Edition

Size:

Size:

Free Shipping on orders $100+

Shipping

Shipping

Processing Timelines

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. Once an order is placed, we cannot guarantee any address updates, order changes or cancellations. Orders placed on Friday after 1PM will not be shipped until the following Monday.


Split Shipments

Most orders will ship from a single warehouse. However, we occasionally ship from a combination of warehouse locations, so you may receive your order in multiple parts. If items from your order ship in separate packages, we’ll send you tracking information for each package when it becomes available.

Delivery Timelines

For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines do not include processing times. See above for details. All transit times are measured in business days which are Monday-Friday, excluding holidays.

Please note, all shipping timelines are estimates and are not guaranteed.

We are not able to ship to US territories (including Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands and American Samoa) at this time.

Easy Exchanges within 30 Days

Returns

Returns

Sale & Last Call

Items discounted 30% and below are eligible for size exchange or store credit. Items discounted above 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.

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.

Rewards Members Earn 27 Points

Product Description

Made with our signature buttery soft fabric, this leakproof thong has absorbency without the bulk. Great for leak protection, the ultra-thin liner absorbs about the same as 2 regular tampons or 2 pantyliners worth. Our patented 360 LeakSeal™ technology locks in leaks at every edge.

Comfort-First Fit

Thong silhouette sits lower on the hip with 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

It absorbs about 2 regular tampons worth of liquid—great for regular flow days, light bladder leaks, and sweat.

No-Show Style

Buttery-soft and smooth fabric gives a seamless look and feel. Disappears under clothes, even leggings.

Easy to Wash

Machine washable just like regular underwear.

Zoom

| Shimmer Cherry
Ashley has 39“ hips wearing KNIX S | Shimmer Cherry
Ashley has 39“ hips wearing KNIX S | Shimmer Cherry
Ashley has 39“ hips wearing KNIX S | Shimmer Cherry
| General
| General
| General
| General

How to Choose?

Essential

  • Days you don’t need leak protection. Everyday freshness and moisture wicking.
  • tsp
    0 tsp

Heavy

  • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
  • 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

  • Daily freshness. For sweat, discharge, period spotting, or backup protection.
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

  • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
  • 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

  • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
  • 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
4.0
Rated 4.0 out of 5 stars
Based on 266 reviews
Total 5 star reviews: 167 Total 4 star reviews: 24 Total 3 star reviews: 21 Total 2 star reviews: 16 Total 1 star reviews: 38
What our customers are saying
Customers say these leakproof thongs offer good protection and comfort for light days, gym wear, and everyday use. Many reviews mention significant sizing inconsistencies, with most recommending sizing up at least one size from usual underwear sizes. Common feedback includes concerns about stiff material and tight fit, particularly around the waistband and edges. While some find the fabric less stretchy than expected, others praise the seamless design and confidence it provides. Frequent comments address the protective gusset placement, with mixed experiences on coverage effectiveness. Reviews are divided on durability and comfort after washing.
74%would recommend these products
FitRated -0.2 on a scale of minus 2 to 2
ComfortRated 3.9 on a scale of 1 to 5
EffectivenessRated 4.1 on a scale of 1 to 5
Keywords
Keywords
Rating
Ratings
Height
Height
Pant Size
Pant Size
Usage
Usage
Pant Size Purchased
Pant Size Purchased
266 reviews
  • Rated 5 out of 5 stars
    9 hours ago
    Great underwear!

    These fit so well. Very comfortable. Don’t move around so no need to keep re-adjusting all day. Highly recommend. I have purchased 4 pairs already. So nice!

    Christine B.
    Verified Buyer
    Reviewing
    Light Leakproof UltraThin No-Show Thong
  • Rated 2 out of 5 stars
    17 hours ago
    Sounds and feels like rubber

    I have ordered them for a while and Lyly they seem like they are more and more being made out of rubber

    Even my husband said what the heck are you wearing it sounds like a rubber band

    Don’t know hat your changing but may have rethink future purchases.

    Same with the bras

    noreen P.
    Verified Buyer
    Reviewing
    Light Leakproof UltraThin No-Show Thong
  • Rated 4 out of 5 stars
    5 days ago
    Run small

    Nice underwear but runs smaller than my other underwear. I have three pairs of size xxl and they run big but the xl is quite a bit smaller.

    Jeannie S.
    Verified Buyer
    Reviewing
    Light Leakproof UltraThin No-Show Thong
  • Rated 5 out of 5 stars
    6 days ago
    Comfortable

    Love this thing. It does stretch out/soften a bit after a while which I appreciated.

    Amanda K.
    Verified Buyer
    Reviewing
    Light Leakproof UltraThin No-Show Thong
  • Rated 4 out of 5 stars
    1 week ago
    Leakproof Thong

    Amazing! So comfortable!

    Hudson W.
    Verified Buyer
    Reviewing
    POS - Light Leakproof UltraThin No-Show Thong - Last Call
  • Rated 5 out of 5 stars
    1 week ago
    Pretty and functional!

    Excellent quality, fit perfect and does the job!

    Olivia B.
    Verified Buyer
    Reviewing
    Light Leakproof UltraThin No-Show Thong
  • Rated 5 out of 5 stars
    1 week ago
    Mystery Bag Love

    I love a good mystery bag! Brings the inner child out of me. Love the thongs. Their comfy. 10/10 recommend. The bras are just as comfy.

    Samantha W.
    Verified Buyer
    Reviewing
    Light Leakproof UltraThin No-Show Thong
  • Rated 5 out of 5 stars
    2 weeks ago
    Anazing

    The best, so comfortable.

    Katie N.
    Verified Buyer
    Reviewing
    Light Leakproof UltraThin No-Show Thong
  • Rated 5 out of 5 stars
    2 weeks ago
    Things

    Amazing I never want to take them off

    Katie S.
    Verified Buyer
    Reviewing
    POS - Light Leakproof UltraThin No-Show Thong - Last Call
  • Rated 1 out of 5 stars
    2 weeks ago
    Great concept, poor execution

    I had high hopes for this product. Unfortunately. I was disappointed by the comfort. Sizing runs small and the absorbent gusset is stiff and awkward , even after multiple washes. Between these and a panty liner, the old school method is a more comfortable option.

    Haley W.
    Verified Buyer
    Reviewing
    Light Leakproof UltraThin No-Show Thong
  • Rated 3 out of 5 stars
    3 weeks ago
    They are ok

    I bought the matching bra. Although I like wearing a thong normally this one is odd. It feels more like a diaper. Not sure why it was designed that way.

    Carolyn R.
    Verified Buyer
    Reviewing
    Light Leakproof UltraThin No-Show Thong
  • Rated 5 out of 5 stars
    1 month ago
    These are great!

    Very comfortable and good moisture control for sweat, leaks and period back up.

    Rochelle B.
    Verified Buyer
    Reviewing
    Light Leakproof UltraThin No-Show Thong