Menu

Need Help Choosing?
Take our Underwear quiz
Need Help Choosing?
Take our Bra quiz
The Polka Dot Edit
New Arrivals

Your Bag

Your cart is empty

But you're full of potential..
Rewards Members Earn 0 Points

Suggestions

Top Picks

Revolution V-Neck Bra

$68.00 CAD
10% off Bra & Underwear Sets*

Color: White with Black Polka Dot Limited Edition

Super Leakproof® Dream Boxer

$48.00 CAD
2 for $82, Save $14

Color: Blue Stripe Limited Edition

Leakproof UltraThin No-Show High Rise

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

Color: Black with White Polka Dot Limited Edition

Uplift Push Up Bra

$78.00 CAD
10% off Bra & Underwear Sets*

Color: Cherry Limited Edition

Home / Teen Period Swimwear / Teen Period Swim Freestyle One-Piece
KnixTeen

Teen Period Swim Freestyle One-Piece

$99.00 CAD

Checkmark

Absorbs about 2 super tampons

Checkmark

Medium coverage style

Checkmark

Sporty scoop neckline

Checkmark

Premium UPF 50+ fabric

Checkmark

Machine washable

| Orchid Ombre
| Orchid Ombre
| Orchid Ombre
| Orchid Ombre
| General

Absorbency: Moderate
Drop
Drop
Drop
Drop
Drop

Color: Orchid Ombre 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.
Easy Returns 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 99 Points

Swim in Style

A sporty and comfortable style with anti-slip racerback straps for added mobility.

Worry-Free Protection

Discreet, built-in protection that absorbs about 2 super tampons worth.

Sun-Smart Protection

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

Zoom

| Orchid Ombre
| Orchid Ombre
| Orchid Ombre
| Orchid Ombre
| 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
LEAKPROOF SWIM WORKS IN LAYERS

Built-in protection that feels like nothing at all.

Looks just like regular swimwear. Non-swelling liner and patented no-show design.

Soft Top Layer

Top Layer

Smooth and comfortable liner in swimsuit fabric.

Explore Teen Best-Sellers

Teen Super Leakproof® Sleepover Boxer

$45.00 CAD

Color: Black

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$65.00 CAD
$75.00
Save $10

Color: Red Tulip/Scarlet/Super Pink Limited Edition

Teen Leakproof UltraThin No-Show Thong

$25.00 CAD
Bundle & Save: 3 for $65

Color: Red Tulip Limited Edition

Teen Period Swim Sport One-Piece

$99.00 CAD

Color: Aquamarine Limited Edition

Teen Period Swim Bikini Bottom

$55.00 CAD

Color: Pink Hibiscus Limited Edition

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$65.00 CAD
$75.00
Save $10

Color: Red Tulip/Scarlet/Super Pink Limited Edition

Teen Super Leakproof® Sleepover Short

$45.00 CAD

Color: Scarlet Limited Edition

Teen First Period Kit - Bikini

From 
$148.50 CAD
$198.00
Save $49
4.3
Rated 4.3 out of 5 stars
Based on 37 reviews
Total 5 star reviews: 24 Total 4 star reviews: 6 Total 3 star reviews: 4 Total 2 star reviews: 1 Total 1 star reviews: 2
81%would recommend these products
Write a Review (Opens in a new window)
37 reviews
  • Rated 5 out of 5 stars
    5 months ago
    Great teen swim

    My daughter loves her swimsuit. We purchased, she wore it 3 times, left for 2 weeks summer camp and got it stolen. She was so bummed and disappointed, it was really the only thing that made her feel confident enough to swim during her periods. We then had to purchase a second one. But it is worth every penny.

    Stephanie T.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 months ago
    Fits well

    Fits very well and works great!

    Andrea M.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    12 months ago
    One piece period wear

    Effective, comfortable, affordable and durable

    Tia T.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 year ago
    Perfect for my active teen!

    My daughter wanted a suit for swim team. This one works great for practice or meets when on her period.

    Leanne Y.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 year ago
    My daughter LOVES this!

    My daughter loves this bathing suit! The fit is perfect, the color is flattering, and you can't tell it's a period bathing suit. I'm very happy with this bathing suit and will definitely continue to purchase more bathing suits from KT by Knix!

    Amber V.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 years ago
    Fit small

    I got this for myself. I feel it fit smaller than other style but still like it.

    Tsugumi K.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 years ago
    Good quality

    I got this for my 13 y old daughter. It’s a second one. she loves it.

    Tsugumi K.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 years ago
    Awkward Swim Classes no more!

    Takes the awkward out of swim classes when your teen has her period. Wish I had this when I was younger!

    Susan P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 years ago
    Swimmer approved

    My daughter loves this suit, and as a member of our local swim team, her opinion is very strong when it comes to suits. If she loves it, it’s a good one

    Kim S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 years ago
    Fits well and comfortable

    It took a few tries to get the right size but once we did, it fit perfectly. Very comfortable and it takes the pressure off my daughter to use tampons when she isn't ready yet.

    Jennifer T.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 years ago
    Thank you KT by Knix for this innovative product!

    It has been working so well for my kiddo who does club competitive swim. Thank you KT by Knix for this innovative product. Hope you add more colors/styles for the competitive swimwear.

    Jane M.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 years ago
    Period Swim Freestyle One-Piece

    My daughter is a competitive swimmer, and she loves everything about this suit!

    Susan B.
    Verified Buyer
    Was this helpful?