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

Ultra Leakproof Zones+® Bikini

$30.60 CAD

$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

| 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

Absorbency: Ultra
Drop
Drop
Drop
Drop
Drop

Color: Black

Size:

True to Size

•

Size:

Size and Fit Guide

Leakproof Underwear is Sales Tax Free in Canada*
Get FREE Express Shipping on all orders $125+

Shipping

HOLIDAY SHIPPING

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

Toronto, Ottawa, Montreal, Winnipeg, Regina, Calgary, Edmonton, Vancouver
Standard & Expedited: Monday, December 22

Urban Centres (excluding the above)
Standard: Wednesday, December 17
Express: Sunday, December 21

Rest of Canada
Standard: Sun, December 14*
Express: Thu, December 18*
*YK, NWT, NT, NL, and remote areas across Canada.

For locations serviced solely by Canada Post, please allow at least 5 additional days due to rotating strikes. This applies to P.O Box and RR addresses.

To avoid any additional delays during the rotating strikes, we will use alternate carriers when possible.

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

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

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.

Sale & Last Call

Items discounted below 30% are eligible for size exchange or store credit. Items discounted 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.
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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

| 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.

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4.1
Rated 4.1 out of 5 stars
Based on 419 reviews
Total 5 star reviews: 263 Total 4 star reviews: 47 Total 3 star reviews: 39 Total 2 star reviews: 24 Total 1 star reviews: 46
78%would recommend these products
ComfortRated 4.1 on a scale of 1 to 5
EffectivenessRated 4.2 on a scale of 1 to 5
FitRated 0.1 on a scale of minus 2 to 2
Ease of UseRated 4.3 on a scale of 1 to 5
Write a Review (Opens in a new window)
419 reviews
  • Rated 5 out of 5 stars
    Yesterday
    Reliable protection

    Excellent quality as always

    Kinga P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 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
    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 5 out of 5 stars
    1 week ago
    5 Stars

    Most secure ive felt from any leaks, and kept me feeling dry

    Dyana
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    5 Stars

    Finally, a super long back. This has been my issues with the dream shorts and even pads - the risk of leaking at the back of the absorbent end when i sit or lie down. This has solved that, and doesnt feel saturated with moisture even on my heaviest days

    Dyana
    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 5 out of 5 stars
    2 weeks ago
    5 Stars

    I purchased the packs from Costco for my teen daughter and she loves them so much she doesn't want to use pads anymore and doesn't even want to wear regular underwear anymore. She swears by these and begged me to buy more, so I thought I'd get her the full coverage ones for nights or when she wants extra protection .

    Wendy
    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
    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?
  • Rated 5 out of 5 stars
    1 month ago
    I can't believe it...

    These are the BEST when you are having your period. I was so nervous there would be leaking or stains everywhere but somehow, some way- they didn't leak once, not even CLOSE.

    I originally got these because I read it might help your cramps if you don't wear tampons anymore and I will never, NEVER go back to anything but these.

    Sara C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    So far so good

    Comfortable

    Sarina P.
    Verified Buyer
    Was this helpful?