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Home / Bikini Underwear / Leakproof UltraThin No-Show Bikini
Limited Time Offer

Leakproof UltraThin No-Show Bikini

$27.00 CAD

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Absorbs about 2.5 super tampons

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Invisible under clothes

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Moderate protection without the bulk

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Machine washable

| Rose Water
| Rose Water
| Rose Water
| Rose Water
| General
| General
| General

Absorbency: Moderate

Moderate
Drop
Drop
Drop
Drop
Drop
about 2-4 super tampons
Essential
Drop
Drop
Drop
Drop
Drop
No Absorbency
Light
Drop
Drop
Drop
Drop
Drop
about 1-3 regular tampons
Heavy
Drop
Drop
Drop
Drop
Drop
about 4-7 super tampons
Ultra
Drop
Drop
Drop
Drop
Drop
about 7-11 super tampons

Color: Rose Water

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

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.
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Comfort-First Fit

Bikini silhouette with a classic mid-rise fit, medium hip and 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.

Zoom

| Rose Water
| Rose Water
| Rose Water
| Rose Water
| 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
    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
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.

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Leakproof UltraThin No-Show Bikini

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Color: Rose Water

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Super Leakproof® Dream Team Kit

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Leakproof UltraThin No-Show French Cut

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4.4
Rated 4.4 out of 5 stars
Based on 635 reviews
Total 5 star reviews: 468 Total 4 star reviews: 65 Total 3 star reviews: 39 Total 2 star reviews: 27 Total 1 star reviews: 36
86%would recommend these products
ComfortRated 4.6 on a scale of 1 to 5
EffectivenessRated 4.6 on a scale of 1 to 5
FitRated -0.2 on a scale of minus 2 to 2
Ease of UseRated 4.7 on a scale of 1 to 5
Write a Review (Opens in a new window)
635 reviews
  • Rated 1 out of 5 stars
    3 minutes ago
    Small

    I own five pairs of these underwear already and these are two inches smaller than my current ones. Unfortunately, since I bought the same size and style that I already have I opened them and washed them before trying them on.

    Marita F.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 hours ago
    Good quality

    Fit well and are comfortable. My first time trying this idea.

    Tess A.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    Yesterday
    Poor fit

    I was excited to see these 3-packs on the Boxing Day sale event. I have previously purchased this style and already had a pair in the cherry colour that I quite like. I purchased two of the 3-packs. Imagine my disappointment! They do not fit the same as my other pairs. Snug around the legs. All six pairs fit the same. And none fit like my previous pairs of ultra thin no show bikinis in the same size and fabric.

    Debbie V. H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    happy teen

    leak proof! confident teen! happy to not have to wear bulky pads anymore!

    Tiffany s.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    happy customer

    fantastic, soft, like wearing regular underwear! highly recommend!

    Tiffany s.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    3 days ago
    Comfortable

    I purchased them for bladder leaks. Have only worn a couple of times. Not a hundred percent sure if they will absorb enough and not feel like a diaper. They are comfortable and will purchase more if they work well.

    Wendy K.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 days ago
    Fantastic

    I love these underwear. This is my 2nd purchase of them. I received some as a gift last year and I loved them so much I bought them again for myself this year and for my mom in law and my sister. These are amazing and I will definitely buy them again.

    Mandi A.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    5 days ago
    Feels Small

    I am not happy with the fit of this style. They felt tight around my legs and smaller than other styles I have purchased. I would advise sizing up.

    Judith H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    Loooove!

    I absolutely love everything about them !

    Cora Y.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    no-show

    These are very comfortable and feel great. Will be a return customer

    thank goodness I found great undies

    judy h. g.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    More Confortable than depends

    First time with this product. My daughter and granddaughter reccomended them. More comfortable than depends for urinary issues

    BARBARA V. L.
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    1 week ago
    So small!

    I am a die-hard Knix fan and have been for years - these are not good! Ordered my regular size and they have to be at least two sizes smaller than normal. So tight, hardly wearable. So disappointing; especially considering they were final sale. Really hoping this is just due to the shimmer fabric and not the direction Knix is taking all of their products. So disappointing.

    Elizabeth V.
    Verified Buyer
    Was this helpful?