Shop by Style

More Ways to Shop

Leakproof Quiz
Why Knix Leakproof Works

Bras

Bra Quiz
Bra Bundles

Swim

New Arrivals
New: SculptRib™
NEW Shape & Smooth Bra
Shop by Life Stage

Your Bag

Your cart is empty

But you're full of potential..
Create an account to join Club Knix and earn points on this order

Suggestions

Top Picks

Super Leakproof® Mini Dream Boxer

$45.00 USD
Buy More, Save More

Color: Pink Stripe Limited Edition

Uplift Push Up Bra

$68.00 USD

Color: Rose Water

+1

Leakproof UltraThin No-Show High Rise

$32.00 USD
Buy More, Save More

Color: Indigo Limited Edition

+5

Super Leakproof® Dream Short™

$48.00 USD
Buy More, Save More

Color: Eucalyptus Limited Edition

+2
Home / Thong Underwear / Essential No-Show Thong

Essential No-Show Thong

$22.00 USD

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

Essential for non-leak days

Invisible under clothes

Always fresh, quick-dry liner

Machine washable

| Lavender
| Lavender
| Lavender
| Lavender
| General

Absorbency: Essential

Essential
No Absorbency
Light
about 1-3 regular tampons
Moderate
about 2-4 super tampons

Color: Lavender Limited Edition

Size:

True to Size

•

Size:

Size and Fit Guide

Build Your 3-Pack

Essential No-Show Thong

Color: Lavender Limited Edition

Size:

Size:

Essential No-Show Thong

Color: Lavender Limited Edition

Size:

Size:

Essential No-Show Thong

Color: Lavender 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

Essential Underwear

Returns & Exchanges

Within 30 days of delivery you can exchange for another size, style, or store credit. We're unable to provide refunds on underwear. If you ordered multiple pairs, please open, wash, and wear one pair only before initiating an exchange.

Still have questions? View our full policy here.
Rewards Members Earn 22 Points

Product Description

You can count on these seamless bottoms for top-notch comfort, without worrying about pantylines. And thanks to its quick dry liner, you’ll feel comfy fresh all day long. This underwear does not protect against leaks.

Comfort-First Fit

The low-rise fit sits at the natural waistline, offering minimal bum coverage.

Essentials Redefined

Designed for daily comfort when you don't need absorbent protection. The carbon-cotton top layer keeps you feeling fresh throughout the day.

No-Show Style

Made from our signature buttery-soft PerformaStretch® fabric, it appears invisible under clothing.

Zoom

| Lavender
| Lavender
| Lavender
| Lavender
| 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

Our Best-Selling Underwear

Shop All

Super Leakproof® Dream Boxer™

$48.00 USD
Buy More, Save More

Color: Eucalyptus Stripe Limited Edition

+1

Super Leakproof® Dream Short™

$48.00 USD
Buy More, Save More

Color: Eucalyptus Limited Edition

+2

Leakproof UltraThin No-Show High Rise

$32.00 USD
Buy More, Save More

Color: Indigo Limited Edition

+5

Leakproof UltraThin No-Show Bikini

$27.00 USD
Buy More, Save More

Color: Eucalyptus Limited Edition

+4

Leakproof UltraThin No-Show French Cut

$27.00 USD
Buy More, Save More

Color: Indigo Limited Edition

+2

SuperPlus Leakproof® No-Show High Rise

$39.00 USD
Buy More, Save More

Color: Black

Super Leakproof® Dream Team 2-Pack

From 
$80.00 USD
$96.00
Save $16

The Full Cycle Kit - Bikini

From 
$125.00 USD
$159.00
Save $34

How to wash

Knix underwear is 100% reusable and machine washable, just like your regular undies. 

  • Rinse

    • Not required. But for best results, you can rinse your leakproof with cold water in the tub or sink before washing.

  • Wash

    • Machine wash on a cold, gentle cycle with mild detergent.

  • Dry

    • For their longest life, air drying is best. Hang or lay flat to dry.

  • Avoid

    • Fabric softeners, bleach, ironing, or heat from the dryer.

    4.6
    Rated 4.6 out of 5 stars
    Based on 1,358 reviews
    Total 5 star reviews: 1.1k Total 4 star reviews: 162 Total 3 star reviews: 48 Total 2 star reviews: 29 Total 1 star reviews: 38
    What our customers are saying
    Customers say these thongs are exceptionally comfortable and soft, with many describing them as the most comfortable underwear they've ever worn. Many reviews mention the no-show feature, noting they're invisible under tight clothing like leggings and workout gear. Users frequently praise how they stay in place without riding up or requiring adjustment throughout the day. Common feedback includes appreciation for the seamless design and breathable fabric that feels like wearing nothing. While most find them true to size, some suggest sizing up as they can run small or feel snug initially. A few mention concerns about durability over time, with seams coming apart after extended wear.
    93%would recommend this product
    ComfortRated 4.7 on a scale of 1 to 5
    SizingRated -0.1 on a scale of minus 2 to 2
    Search
    Search Reviews
    Keywords
    Keywords
    Rating
    Ratings
    Height
    Height
    Usual Pant Size
    Usual Pant Size
    Pant Size Purchased
    Pant Size Purchased
    Write a Review (Opens in a new window)
    1,358 reviews
    • Rated 5 out of 5 stars
      3 months ago
      Best thong for yoga!

      This is my favourite underwear for under leggings for yoga classes! They stay in place and wick the sweat away. Now I need 10 more pairs!!

      Kate S.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 5 out of 5 stars
      4 months ago
      Great Thongs!

      Comfy, stays in place with good coverage.

      Kayla S.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 2 out of 5 stars
      4 months ago
      Moves around too much

      The fabric is soft. But the front coverage is off. It doesn’t cover enough in front and/or has no elasticity to hold the crotch area in place. So it moves around, gets stuck up front, etc, and is overall uncomfortable in the crotch area. True to my regular pants size — M. Occasionally I wear a small in underwear, but the medium in these was perfect in terms of sizing.

      smoics
      Verified Reviewer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 1 out of 5 stars
      4 months ago
      No show thong

      Was disappointed in the fit. Tried on in store and the fit seemed fine in the crotch area. Followed washing instructions, tried them on and crotch area was way to narrow and fit was very uncomfortable. I would not purchase again.

      Lori T.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 5 out of 5 stars
      5 months ago
      Comfortable!

      Super comfortable, soft, and flattering!

      Lindsey G.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 5 out of 5 stars
      5 months ago
      Go to

      These are my and my daughters go to. Exercise, leggings, etc. fit well. A little snug at first , but then perfect.

      Maureen M.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 5 out of 5 stars
      5 months ago
      Love it

      Very happy with this thong. It fits true to size and is super comfy

      Alana Z.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 1 out of 5 stars
      5 months ago
      Size up

      I am a M is all Knox things. This thong was WAY smaller. I emailed to ask for an exchange and no one replied. A very disappointing and expensive purchase unfortunately.

      Kaitlan H.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 5 out of 5 stars
      5 months ago
      my new favourite

      i have not worn thongs before but i really love this one! it doesnt seem to ride up! i ordered more in leakproof!

      Stacey P.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 5 out of 5 stars
      5 months ago
      So comfortable

      Love these! So thin and comfortable and never shows. Definitely recommend them.

      Tracey H.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 5 out of 5 stars
      5 months ago
      Wonderful product

      I have been ordering this thing for many years now. The fabric and fit are just perfect

      Tammy G.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?
    • Rated 5 out of 5 stars
      6 months ago
      comfortable

      slim fit just like regular thong...

      Mee E. K.
      Verified Buyer
      Reviewing
      Essential No-Show Thong
      Was this helpful?

    Your underwear questions, answered.

    Shop by Silhouette

    High Rise

    Bikini

    French Cut

    Thong

    Boxers

    Boyshort

    Kits & Packs