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| Black
Light Leakproof No-Show Bikini
$25.00 CAD

Color: Black
Best Seller

Color: Black

Size:

Size:

Size and Fit Guide

Mix & Match: 3+ for $20 each
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Home / Shop All Teen / Teen Period Swim Bikini Bottom
Best Seller

Teen Period Swim Bikini Bottom

$55.00 CAD

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Absorb about 3 regular tampons

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Lower to mid-rise fit

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Medium coverage style

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Premium UPF 50+ fabric

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Machine washable

Rose (she/her) has 35

Rose (she/her) has 35" hips and is wearing a size M

| Black
Rose (she/her) has 35

Rose (she/her) has 35" hips and is wearing a size M

| Black

Rose (she/her) has 35" hips and is wearing a size M

Absorbency: Moderate
Drop
Drop
Drop
Drop
Drop

Color: Black

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
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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Swim in Style

Classic cut and swim collection staple. Lower to mid-rise with mid-cut leg and medium bum coverage.

Worry-Free Protection

Discreet, built-in protection that absorbs about 3 regular tampons worth.

Stay Sun-Safe

Premium UPF 50+ fabric shields you from UV rays while you relax, swim, and play.

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Rose (she/her) has 35
| Black
Rose (she/her) has 35
| Black

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
    6-11 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 3-6 super tampons
  • cup
    about 1-2 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • • light period days
  • • sweat
  • • sweat and 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 3-6 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-3 super tampons
  • cup
    about 0.5-1 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • • extra heavy period days
  • • overnight protection
  • • light bladder leaks
  • tsp
    13-17 tsp
  • pad
    3.5-4.5 regular pads
  • tampon
    7-9 super tampons
  • cup
    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.

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4.6
Rated 4.6 out of 5 stars
Based on 109 reviews
Total 5 star reviews: 91 Total 4 star reviews: 7 Total 3 star reviews: 4 Total 2 star reviews: 2 Total 1 star reviews: 5
91%would recommend these products
ComfortRated 4.7 on a scale of 1 to 5
FitRated 0.0 on a scale of minus 2 to 2
EffectivenessRated 4.5 on a scale of 1 to 5
Ease of UseRated 5.0 on a scale of 1 to 5
Write a Review (Opens in a new window)
109 reviews
  • Rated 5 out of 5 stars
    3 days ago
    period swim bottom review

    Fit perfectly and were good for all day use at the beach

    Emily G. G.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Period Swim bottoms

    The material is excellent and my daughter loves the cut and feel of these SWIM bottoms. She is 13 and wears size Small and it flatters her body. Now she can swim even on those "moon days!" True, it's not perfect because on heavy days some liquid runs down her leg but when that happens she has more reason to jump back in the lake!

    Cheryl A.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 weeks ago
    So comfy

    Best swimwear ever

    Mia F.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    1 month ago
    Really cute,

    Look adorable. Work well for light to medium days look just like regular bathing suit bottoms.

    jenn d.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    THANK YOU!

    My 12 year old daughter can now have a "normal" summer. I can't tell you how much of a relief it is to know that she can swim and have fun with her friends at any time of the month.

    Katrin H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    This swimwear is a must have for tweens and teens

    My daughter will be 13 yrs old in a couple of months and she just started her period. She’s not ready to try tampons. A friend told us about KT swimwear. I bought her two bottoms (the bikini and the midrise style bottom’s) to try for our Hawaii vacation. She got her period while we were there. She swam in the ocean, pool (went down water slides), snorkeling and bodyboarding. Bottoms stayed in place and provided hours of protection! Going to get her another KT swimsuit for camp. She’s around 92 lbs, wears a size 14 in kids or an XXS/XS (00/0) in adults, purchased a size S in KT and the bottoms fit her perfect.

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

    These barhing suit bottoms give my daughter such confidence. She is not missing any water activities this summer!

    Holli
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 months ago
    Just what she needed

    Where were these when we were growing up?! Just what my daughter needed with starting right at the beginning of summer time. Made her feel so much comfortable going to the pool and beach for the first time. Thank you!!

    Paige C.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    2 months ago
    A little cheeky

    The description read as full coverage, so these were a little cheeky on my 11 year old. I am exchanging for full coverage bottoms. Very cute.

    Karen M.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 months ago
    Daughter loves them!

    Wish I had bought sooner

    Marie G.
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    3 months ago
    Runs small

    I order a medium. Fits more like a small.

    Victoria B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 months ago
    Love these for my teens

    Simple black bottoms avoid any period mishaps. Comfortable, trendy and discreet. Highly recommended.

    Stephanie R.
    Verified Buyer
    Was this helpful?