Shop by Style

Ways to Save

Need Help Choosing?
Why Knix Leakproof Works

Bras

Need Help Choosing?
Find Your Bra Size

Sale

NEW Shape & Smooth Bra
15% off FreeFlex™ Bra
Super Leakproof® Cotton
Need Help Choosing?

Your Bag

Your cart is empty

But you're full of potential..
Create an account to join Club Knix and earn points on this order

Suggestions

Top Picks

Revolution V-Neck Bra

$68.00 CAD
10% off Bra & Underwear Sets*

Color: White with Black Polka Dot Limited Edition

+8

Super Leakproof® Dream Boxer™

$48.00 CAD
2 for $80, Save $16

Color: Blue Stripe

Leakproof UltraThin No-Show High Rise

$32.00 CAD
Mix, Match & Save: 3+ for $25 each

Color: Black with White Polka Dot Limited Edition

+3

Uplift Push Up Bra

$78.00 CAD
10% off Bra & Underwear Sets*

Color: Rose Water

+1
Home / Swim One-Pieces / Leakproof Classic One Piece Swimsuit - Last Call
Sale

Leakproof Classic One Piece Swimsuit - Last Call

$50.00 CAD

$125.00

30-60% off
Checkmark

Our #1 selling one-piece

Checkmark

Built-in leak protection

Checkmark

Premium UPF 50+ fabric

| Hibiscus Heat
| General

Absorbency: Light

Color: Hibiscus Heat Limited Edition

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.

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.
Last Call Return Policy

Sale & Last Call

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.
Rewards Members Earn 50 Points

"Brilliant for unexpected spotting."

- Oprah Daily

Classic Style

A fit we've spent years perfecting.

Sun-Smart Protection

UPF 50+ fabric protects your skin while you soak up the sun.

Worry-Free Protection

Discreet, built-in protection that absorbs about 1 regular tampon worth.

Feels Made For You

Thicker, adjustable straps make it adaptable for different sizes and torso lengths. It features a shelf bra with removable cups and full bum coverage.

Zoom

| Hibiscus Heat
| General

How to Choose?

Essential

  • • Days you don’t need leak protection. Everyday freshness and moisture wicking.
  • tsp
    0 tsp

Heavy

  • • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
  • 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

  • • Daily freshness. For sweat, discharge, period spotting, or backup protection.
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

  • • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
  • 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

  • • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
  • 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

Explore Best-Sellers

Shop All

Revolution V-Neck Bra

$68.00 CAD
10% off Bra & Underwear Sets*

Color: Black

+8

Super Leakproof® Dream Boxer™

$48.00 CAD
2 for $80, Save $16

Color: Blue Stripe

WingWoman Contour Bra

$75.00 CAD

Color: Black

+4

Super Leakproof® Dream Short™

$48.00 CAD
2 for $80, Save $16

Color: Warm Sand

+2

Uplift Push Up Bra

$78.00 CAD
10% off Bra & Underwear Sets*

Color: Black

+1

Leakproof UltraThin No-Show Bikini

$27.00 CAD
Mix, Match & Save: 3+ for $25 each

Color: Warm Sand

+4

Catalyst Sports Bra

$85.00 CAD
10% off Bra & Underwear Sets*

Color: Blue Light Limited Edition

HiTouch™️ High Rise Legging

$90.00 CAD

Color: Twilight Navy

+2
4.6
Rated 4.6 out of 5 stars
Based on 198 reviews
Total 5 star reviews: 161 Total 4 star reviews: 15 Total 3 star reviews: 12 Total 2 star reviews: 4 Total 1 star reviews: 6
91%would recommend these products
ComfortRated 4.8 on a scale of 1 to 5
FitRated 0.1 on a scale of minus 2 to 2
SupportRated 4.3 on a scale of 1 to 5
EffectivenessRated 4.6 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)
198 reviews
  • Rated 5 out of 5 stars
    1 month ago
    Great fit

    I love this bathing suit and was pleasantly surprised at how well it fit! Got my normal swimsuit size. I'd prefer a little more lift but it's very nice for being a one-piece. Got it at a major sale price so even more worth it.

    Dayna E.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    The most flattering swimsuit

    Bought this swimsuit last year in another colour and received so many compliments Thats I bought it again when on sale.

    Karin W.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Comfortable swimsuit

    Feel comfortable and confident

    LIEZEL J.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 months ago
    5 Stars

    Love this and love that it comes in long torso!

    Janine
    Was this helpful?
  • Rated 5 out of 5 stars
    2 months ago
    Gorgeous color

    Beautiful colour and nice fit. I like that it is a comfortable suit with great coverage for a layabout day on the beach

    Catherine M.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 months ago
    Worked well

    Was nervous to try but used on a mid-cycle day with no leaks or mess

    Charlotte T.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 months ago
    5 Stars

    So comfortable and well constructed!

    Ashley
    Was this helpful?
  • Rated 5 out of 5 stars
    3 months ago
    Fabulous Fit!

    A super fit. Classic style. Beautiful fabric.

    Jayne B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 months ago
    I love this suit!

    As a mom of two small kids, I LOVE this suit. It is so comfortable, flattering and I feel so great in it. Highly recommend!

    Mary C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 months ago
    Great Suit

    Nice suit, does the job

    Shari L.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 months ago
    classic one piece swimsuit

    This swimsuit is so comfortable and nice to have on for a lot of the day.

    Erika H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    5 months ago
    Perfect for t’allais people

    Long Torso fits perfectly.

    Marie-France F.
    Verified Buyer
    Was this helpful?

Shop by Category

Bras

Leakproof Underwear

Sleep

New Arrivals

Best Sellers

Apparel

Active

Shapewear

Mens

Teen