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Home / Bikini Underwear / Leakproof Cotton Bikini
Best Seller

Leakproof Cotton Bikini

$25.00 USD

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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

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.
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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.

Our Best-Selling Underwear

Shop All Arrow Right
4.5
Rated 4.5 out of 5 stars
Based on 176 reviews
Total 5 star reviews: 135 Total 4 star reviews: 15 Total 3 star reviews: 9 Total 2 star reviews: 10 Total 1 star reviews: 7
86%would recommend this product
FitRated 0.0 on a scale of minus 2 to 2
ComfortRated 4.6 on a scale of 1 to 5
EffectivenessRated 4.5 on a scale of 1 to 5
Ease of UseRated 4.7 on a scale of 1 to 5
Write a Review (Opens in a new window)
176 reviews
  • Rated 5 out of 5 stars
    3 minutes ago
    Amazing!

    My husband encouraged me to get more of these! We are both happy with them (since he sees how happy I’m in them). The best period solution and so comfortable!

    I highly recommend them and am looking forward to relying on them in the future as well.

    Aleksander S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 days ago
    Satisfied

    Love the material, the absorption, the care is so easy!

    Elizabeth H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    5 days ago
    Cotton brief

    I really liked the feeling of the cotton brief.

    Karen A.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    ❤️

    Very comfortable and works great for bladder leaks.

    Marcia S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Super Comfortable!

    I love the comfort of this style. The legs are high cut and the coverage is great.

    True to size!

    Judith H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    excellent quality

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

    Toni F.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Theyre so comfortable, as someone who never really knows if an L or XL will fit this was definitly the better, ESPECIALLY when bloated.

    Noelle
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    I love these so much, theyre so comfortable and a little more snug, so if you are a L/XL like me it might be better to size up.

    Noelle
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month 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
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Comfy and leakproof

    These are super comfortable.

    Andrea C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month 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
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    This goes for all the products in the package. I love Knix‘s leakproof underwear however, I think I prefer the cotton over the shiny material, but this is the first time that I’ve tried this out or that it’s been offered.

    Stephanie
    Was this helpful?