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Color: Black
Best Seller

Color: Black

Size:

Size:

Size and Fit Guide

Mix & Match: 3+ for $20 each
Rewards Members Earn 0 Points
Kristen's Fave

Light Leakproof UltraThin No-Show Thong

$27.00 CAD

Mix & Match: 3+ for $20 each
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Absorbs about 2 regular tampons

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Invisible under clothes

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More absorbency without bulk

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Machine washable

| Cosmic
| Cosmic
| Cosmic
| General
| General
| General
| General

Color: Cosmic Limited Edition

Size:

True to Size

Size:

Size and Fit Guide

Leakproof Underwear is Sales Tax Free in Canada*
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.

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* CAD = Free Shipping (2-6 business days)
Orders under $100* CAD = $12 CAD Shipping (1-3 business days)
Orders delivering to NWT, Nunavut and Yukon are subject to $20 delivery fee.*After discounts, before shipping and taxes.

Easy Exchanges within 30 Days

Returns

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.

Sale & Last Call

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.

Rewards Members Earn 27 Points

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

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.

Zoom

| Cosmic
| Cosmic
| Cosmic
| General
| General
| 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
    6-11 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 3-6 super tampons
  • cup
    about 1-2 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • light period days
  • sweat
  • sweat and 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 3-6 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-3 super tampons
  • cup
    about 0.5-1 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • extra heavy period days
  • overnight protection
  • light bladder leaks
  • tsp
    13-17 tsp
  • pad
    3.5-4.5 regular pads
  • tampon
    7-9 super tampons
  • cup
    2-3 menstrual cups
FRESH FIX TECHNOLOGY®

Built-in protection that feels like nothing at all.

Our patented 360 LeakSeal™ technology locks in leaks at every edge. The ultra-thin liner absorbs about 2.5 super tampons worth of liquid.

Soft Top Layer

Soft Top Layer

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

4.1
Rated 4.1 out of 5 stars
Based on 182 reviews
Total 5 star reviews: 120 Total 4 star reviews: 19 Total 3 star reviews: 10 Total 2 star reviews: 12 Total 1 star reviews: 21
79%would recommend these products
ComfortRated 3.8 on a scale of 1 to 5
EffectivenessRated 4.1 on a scale of 1 to 5
FitRated -0.2 on a scale of minus 2 to 2
Ease of UseRated 4.3 on a scale of 1 to 5
182 reviews
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    My daughter likes this style as much as her other Knix leak proof panties. 5 stars!

    Rhonda
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    These work so well for light leaks, and so comfortable, i highly recommend

    Keeps you dry, great product

    Marcia
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Light Leakproof Ultra Thin No-Show Thong

    The best undergarment I have purchased in many years. Definitely would recommend.

    Annette L.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Great for under leggings!

    These are great for wearing under leggings at the gym. They don’t show at all.

    Amy B.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Beautfiul color and comfy

    Kathy
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    J’adore mes nouvelles culottes. Elles sont méga confortables.

    Eve
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Comfort

    Seamless and comfortable

    Natalie C.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    The only underwear I wear now!

    These are so comfortable and help keep me cool and protected without feeling bulky - love them!

    Kathryn P.
    Verified Buyer
  • Rated 4 out of 5 stars
    1 month ago
    Nice

    Nice thongs. I wore them under bike shorts and where the extra padding joins the material is a bit thicker and you can see it stick out on the bike shorts it is ok because my shirt covers it. I ordered more in different colours.

    Shelly E.
    Verified Buyer
  • Rated 3 out of 5 stars
    1 month ago
    Not a fan of “Ultrathin” style

    Definitely prefer the non “ultrathin” style. Yes, these seem to have a larger gusset which in theory should be great, but it’s very front-heavy, and I find they ride up the front, leaving little protection where I actually need it. I have to adjust their placement numerous times a day.

    Michelle R.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Light leakproof ultra thin no show thong

    Perfect product, comfortable

    Joanne W.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Light leakproof ultra thin no show thong

    Comfortable! Amazing product

    Joanne W.
    Verified Buyer