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Home / Bikini Underwear / Ultra Leakproof Zones+® Bikini
Joanna's Pick 🎁

Ultra Leakproof Zones+® Bikini

$30.60 USD

$36.00

15% off
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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

Analysa has 46.5”

Analysa has 46.5”" hips and wears a Knix size XXL

| Rose Water
Analysa has 46.5”

Analysa has 46.5”" hips and wears a Knix size XXL

Analysa has 46.5”

Analysa has 46.5”" hips and wears a Knix size XXL

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

Analysa has 46.5”" hips and wears a Knix size XXL

Absorbency: Ultra
Drop
Drop
Drop
Drop
Drop

Color: Rose Water

Size:

True to Size

•

Size:

Size and Fit Guide

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Give the gift of Knix! To receive your order by Dec 24th, please order by the following dates.

All States - Urban Centers (except Hawaii, Alaska)
Standard: Sunday, December 14
Express: Tuesday, December 17

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Standard: Wednesday, December 10
Express: Wednesday, December 10
Express shipping is unavailable for international orders:

Africa, Central/South America, and Caribbean
Standard: Wednesday, December 10

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Standard: Thursday, December 11

Europe and the Middle East 
Standard: Thursday, December 11

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Standard: Monday, December 15

Please note: Weather conditions and carrier issues may cause delays. Delivery dates are not guaranteed.

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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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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.

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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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"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

Analysa has 46.5”
| Rose Water
Analysa has 46.5”
Analysa has 46.5”
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.

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4.1
Rated 4.1 out of 5 stars
Based on 411 reviews
Total 5 star reviews: 258 Total 4 star reviews: 45 Total 3 star reviews: 39 Total 2 star reviews: 24 Total 1 star reviews: 45
78%would recommend this product
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411 reviews
  • Rated 5 out of 5 stars
    21 seconds ago
    Reliable protection

    Excellent quality as always

    Kinga P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    5 Stars

    i did not expect them to he so comfortable but they are. and they have so much coverage i love them!

    Mia
    Was this helpful?
  • Rated 5 out of 5 stars
    2 days ago
    5 Stars

    Comfy

    LEAH
    Was this helpful?
  • Rated 5 out of 5 stars
    4 days ago
    5 Stars

    They absolutely work!

    christina
    Was this helpful?
  • Rated 5 out of 5 stars
    5 days ago
    I love these

    These are amazing! They are comfortable and I never worry about leaks.

    Tiffany M.
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    1 week ago
    Works but the fit is not it.

    Despite using the size charts and taking accurate measurements, this tends to roll down under my stomach which means that I end up having to pull it up. If there’s a shift it creates a gap between the underwear & your body, which means that it’s not really keeping odors trapped like you want it to.

    Criss M.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    5 Stars

    Always great!

    Kinga
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Ultra

    My little lady is only 13, these work great anytime of day. Wish they had these 20 years ago. Love them

    Lora C.
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    2 weeks ago
    Old style zone+ that have limited coverage in front

    Bought some on sale in late summer/ early fall for a member of family and it had limited coverage in front.. the new and updated design are better... skip these old products.

    MaryH
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    1 month ago
    Zones

    I’m glad Knix understands that some of us need a larger absorbent panel. For whatever reason, I bleed more in the front. This has made other underwear worthless. These hold up with no leaks. I do wish there was just a bit more bum coverage, but that’s just my personal taste. Rating 4 stars for that reason.

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

    Very comfortable and they work great!

    Patricia
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    These are the ultimate protection! The leak proof zone goes all the way up to the back waistband ensuring a good nights sleep. with absolutely no leaks! I ordered three pairs and large, but wish I ordered them in medium, whereas I’m 125 lbs but have a long back needing that complicatedovernight coverage!

    These are for complete overnight protection. Broke my back, have fibromyalgia, stenosis of the spine, degenerative disc disease, neck, replacements, SI fusion- all causes bladder leaks. Days in a row dry as can be, but when my nerves are raw, I get to be so worn out, my body feels heavy and my nerves are haywire! I don’t have to worry about leaks giving real sleep to those who need it!

    Pauline M.
    Verified Buyer
    Was this helpful?