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New

Ultra Leakproof Zones+® Bikini

$36.00 USD

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Absorbs about 9 super tampons

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Invisible under clothes

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Extended gusset for extra protection

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Machine washable

| Black
| Black
| Black
| Black
Made with soft, stretchy fabric that’s quick dry for your comfort | General

Made with soft, stretchy fabric that’s quick dry for your comfort

Designed with extra long protective coverage in the front & back | General

Designed with extra long protective coverage in the front & back

Washes just like regular underwear | General

Washes just like regular underwear

Color: Black

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.

Rewards Members Earn 36 Points

"When Mother Nature decides to bless you with her presence on leg day, bust out this pair for a workout that’s as comfortable as possible."

- InStyle

Comfort-First Fit

Bikini silhouette with a mid-rise fit and medium hip and bum coverage.

Worry-Free Protection

Our most absorbent underwear features an extra-long liner that runs high in the front and up the back. Patented 360 LeakSeal™ technology provides leakproof protection at every edge.

Ultra Absorbency

Absorbs 9 super tampons worth of liquid—great for heavy flow days, overnight protection, and light bladder leaks.

No-Show Style

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

Easy to Wash

Machine washable just like regular underwear.

Zoom

| Black
| Black
| Black
| Black
Made with soft, stretchy fabric that’s quick dry for your comfort | General
Designed with extra long protective coverage in the front & back | General
Washes just like regular underwear | 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 7-9 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 444 reviews
Total 5 star reviews: 277 Total 4 star reviews: 48 Total 3 star reviews: 40 Total 2 star reviews: 25 Total 1 star reviews: 54
77%would recommend this product
444 reviews
  • Rated 5 out of 5 stars
    26 seconds ago
    Ultra Leakproof

    Loved them

    Janet F.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Very comfortable

    Fit nice

    Harley H.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Awesome

    Love them !!!!

    Marie-Eve P.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Heavy day go to

    My new favorite pair for my heavy days. Very comfortable and it really doesn’t show under clothes and has a barely there feel

    Cara H.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Perfect product

    Nice size and protect 100 % is the best im not woory any more for accidents

    Olga V.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    excellent

    excellent

    Donnie H.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Love these!!

    These are very comfy!! I can't wait to get more!!

    Monica R.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Comfortable

    Just like the other styles I bought, very very comfortable and makes a big difference in those uncomfortable few days. Wish I bought them sooner. So worth it. My daughter and I are very happy with them

    Yoko H.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Period panties for my daughter

    I bought these for my daughter who prefers these two, the typical feminine hygiene products. Plus their washable reusable!

    Laureen S.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Undies

    these are very comfortable and feels like wearing nothing

    So glad I found great and stylish undies

    judy h. g.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Great protection

    These are true to size and are very comfortable. The offer great protection

    Donna F.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Really Good

    Did the trick

    D
    Verified Buyer