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Home / Bikini Underwear / Leakproof Cotton Bikini
Best Seller

Leakproof Cotton Bikini

$25.00 CAD

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Absorbs about 3 super tampons

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Breathable cotton comfort

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More absorbent without the bulk

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Machine washable

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

Absorbency: Moderate
Drop
Drop
Drop
Drop
Drop

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

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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.

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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

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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 and medium hip and bum coverage.

Worry-Free Protection

An innovative floating gusset provides leak protection from every angle.

Moderate Absorbency

Absorbs about 3 super tampons worth of liquid—great for moderate flow days, light bladder leaks, and sweat.

Cozy Cotton-Blend

Soft cotton spandex feels luxurious against your skin.

OEKO-TEX® Certified

Certified according to OEKO-TEX® STANDARD 100, Product Class I : HK020 246396 TESTEX

Easy to Wash

Machine washable just like regular underwear.

Zoom

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

Absorbs about 2-3 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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Super Leakproof® Dream Short

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Leakproof UltraThin No-Show High Rise Shimmer 3-Pack

$75.00 CAD
$96.00
Save $21

Color: Tapestry/Burnished Gold/Dark Cherry Limited Edition

Leakproof Cotton High Rise

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Mix & Match: 3+ for $25 each

Color: Black

4.4
Rated 4.4 out of 5 stars
Based on 164 reviews
Total 5 star reviews: 123 Total 4 star reviews: 15 Total 3 star reviews: 9 Total 2 star reviews: 9 Total 1 star reviews: 8
85%would recommend these products
ComfortRated 4.6 on a scale of 1 to 5
EffectivenessRated 4.5 on a scale of 1 to 5
FitRated 0.0 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)
164 reviews
  • Rated 5 out of 5 stars
    2 days ago
    excellent quality

    These briefs are comfortable and true to size. I am going to buy more.

    Toni F.
    Verified Buyer
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  • Rated 4 out of 5 stars
    1 week ago
    Nice fit, does the job

    I really like these fit on these. I’m normally a L, but sized up to an XL and I’m glad I did. Usually a size 12-14 pant depending on the fit. I have larger hips and a butt from skating. The waist band is very comfortable and thicker than I’m used to, but I really like it. The stretch of the fabric is good and it holds its shape well. Took a little getting used to the padding, but it certainly did its job for discharge and sweat. Haven’t tried it yet for periods but it did way better than a liner and kept me dry and chafing free all day long. I like these much better than the no-show bikini underwear. It’s much more true to size than the no-show. Doesn’t ride up my butt as the cut is full. Very happy and ordered 5 more pairs to get me through the week! Wish there was a lighter padded version for every day wear.

    J
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  • Rated 1 out of 5 stars
    1 week ago
    1 Star

    The absorbant liners aren't stitched down all the way, which makes them bunch up in the middle. My previous orders were not like this. I unfortunately do not like this style, as for me, bunching and shifting liners ruins the whole point of having period underwear.

    Jen
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  • Rated 5 out of 5 stars
    2 weeks ago
    soft, warm protection

    I am 5'7" about 153lbs. I fit in pant size 12&14, depending if I want a tight or loose fit. This panty fits me in a L, even if I gained a couple pounds. (The No-Show Bikini fits better for me in an XL). I like this Leakproof Cotton bikini for the colder winter months, I work outside in the construction business and have occasional leakage, mostly minor. I can be confident that leakage will not require me to excuse myself from the job suddenly or cause embarrassment. I have 3 pairs of this panty and am happy to grab them from the drawer on colder winter mornings.

    Angie H.
    Verified Buyer
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  • Rated 5 out of 5 stars
    2 weeks ago
    Comfy and leakproof

    These are super comfortable.

    Andrea C.
    Verified Buyer
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  • Rated 5 out of 5 stars
    3 weeks ago
    So far so good

    I like how comfortable they are! My period isn’t too heavy so I can’t speak on that but they worked for me!

    Shae S.
    Verified Buyer
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  • Rated 4 out of 5 stars
    4 weeks ago
    Leakproof cotton bikini

    Love the style I should have ordered a size bigger and I need a bit more aborbancy for bladder leaks

    Charlotte C.
    Verified Buyer
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  • Rated 5 out of 5 stars
    1 month ago
    Amazingly Comfortable

    These are my favorite of the three styles I purchased. I really like the cotton fabric. It's soft, fits well, and stays in place- no wedgies or leaks. They are great for light days or as a back up coverage if also using tampons.

    Christa R.
    Verified Buyer
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  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    These are amazing and I think the ninth pair that I’ve bought never wanna go without

    Lisa
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  • Rated 2 out of 5 stars
    1 month ago
    Disappointed, not the same as no-show styles

    Wanted to switch to cotton for more breathable options but these are not the same as the seamless no-show styles from Knix. The seams are very thick and the gusset absorbent pad is as thick as a heavy flow maxi pad. It definitely feels like you’re wearing a diaper and it shows if you’re wearing leggings or anything tight. I decided to keep anyway because I do like cotton but I would only wear these under very loose pants or dresses/skirts and only on heavier flow days. I wish Knix would show the pic of what the gusset looks like on their product page so everyone can see what they’re getting.

    Winnie
    Verified Buyer
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  • Rated 5 out of 5 stars
    1 month ago
    I've never been so happy with underwear

    I've been a Knix fan for many years, and swear by their leak proof undies. That said, I could not possibly be more impressed with these. They're incredibly comfortable, absorbent enough that I don't feel like I'm wearing a wet diaper all day, and really a lovely underwear experience. Thanks for the upgrade, Knix!

    Anon
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  • Rated 2 out of 5 stars
    1 month ago
    floating gusset

    I ordered a 6 pack of large on sale. I did not expect how the liner would be free from the actual panties on the sides. The fit is fine but when I'm just walking, I feel like they need to be adjusted. I don't like wearing them and I can't return them.

    Marlenna
    Verified Reviewer
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