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Home / Bikini Underwear / Ultra Leakproof Zones+® Bikini
Hot Deal 🔥

Ultra Leakproof Zones+® Bikini

$25.00 CAD

$36.00

2 for $40
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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.
Year End Sale Return Policy

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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"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 422 reviews
Total 5 star reviews: 263 Total 4 star reviews: 48 Total 3 star reviews: 40 Total 2 star reviews: 24 Total 1 star reviews: 47
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)
422 reviews
  • Rated 4 out of 5 stars
    4 minutes ago
    They are comfortable

    They fit, and they are comfortable, no irritating seams. The only draw back is that they weren't cotton.

    Judy C.
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    Yesterday
    The items are not as expected, unfortunately they cannot be returned, as it was considered final sale.

    I’ll never buy these ever again and not sure, after having bought so many things from your business, if I will ever return as a customer.

    Miechel P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 days ago
    Reliable protection

    Excellent quality as always

    Kinga P.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    3 days ago
    Not what I was expecting fit wise

    Finally decided to order because there was a sale and I usually have a pretty tight budget. I researched to try and find the best fit for me but must have been mistaken. The bikini style to me is a little bit more like a mini French cut. Though it does not come up as high on the hips, it does not offer the bum coverage that I was expecting. Since I bought it as a sale and it is not returnable or exchangeable, I am hoping that once I wear it without trying it on over something else I will like the fit better. Unfortunately at this point I would not be ordering again because it looks like the boys shorts are about the only thing that would cover my full bum, but I am not even sure anymore . Really during that time of the month I don't want any of my lower rear end to feel like it is not covered. I feel like if I had ordered a size up then the leg holes would be even larger covering even less of my bum. I could be mistaken and hopefully after I wear them for real I won't have these same concerns but right now I'm disappointed.

    Ste
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week 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
    2 weeks 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
    2 weeks 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?