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Underwear By Absorbency
Light
Drop
Drop
Drop
Drop
Drop

Absorbs 1-3 regular tampons
Moderate
Drop
Drop
Drop
Drop
Drop

Absorbs 2-4 super tampons
Heavy
Drop
Drop
Drop
Drop
Drop

Absorbs 4-7 super tampons
Leakproof Explained
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5 Reasons to Wear Leakproof

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Home / 20% off Teen Period Swimwear / Period Swim Bikini Bottom
20% Off

Period Swim Bikini Bottom

$44.00 CAD

$55.00

Extra 10% off when you buy 4+
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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: Light
Drop
Drop
Drop
Drop
Drop

Color: Black Limited Edition

Size:

True to Size

•

Size and Fit Guide

FREE Shipping on orders $80+

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. Once an order is placed, we cannot guarantee any address updates, order changes or cancellations. Orders placed on Friday after 1PM will not be shipped until the following Monday.

Most orders will ship from a single warehouse. However, we occasionally ship from a combination of warehouse locations, so you may receive your order in multiple parts. If items from your order ship in separate packages, we’ll send you tracking information for each package when it becomes available.

Delivery Timelines

For the most up to date delivery time estimates, please refer to the shipping timeline at checkout. All transit times are measured in business days which are Monday-Friday, excluding holidays.

Please note, all shipping timelines are estimates and are not guaranteed.

Canadian Orders

Orders within Canada will be shipped with Canada Post or Purolator based on your address and carrier availability.

Standard Canadian shipping is free on eligible orders over $80 CAD*. Orders under $80 CAD are $12 CAD for standard shipping. Orders delivering to NWT, Nunavut, and Yukon under $100 CAD* are $20 CAD for standard Canada shipping.

*After discounts, before shipping and taxes
Return Policy

Return Policy

Return Policy

Return policy varies by product, please check if your item is refund or exchange eligible by viewing our full policy here.
“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.

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Swim 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.

Sun-Smart Protection

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

Zoom

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

How to Choose?

Heavy

Drop
Drop
Drop
Drop
Drop
  • • Perfect for overnight protection or your teens heaviest days when changing into a fresh pair might not be convenient.
  • 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
  • • Ideal for lightest period days, spotting, 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
  • • Ideal for medium period days, discharge and 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
  • • Ultimate peace of mind. For the heaviest period days 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
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.

Make It A Set

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Your questions, answered.
4.4
Rated 4.4 out of 5 stars
Based on 143 reviews
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143 reviews
  • Rated 4 out of 5 stars
    7 months ago
    Bikini bottoms

    Great item. Only thing to look out for is when they are wet and you sit on a towel they will leak through.

    Kate I.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    9 months 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
    6 months ago
    Great bottoms

    Love these and work well alone or under swimsuit. The only decent ones for teens :)

    Tracey P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    8 months ago
    Best fit ever

    My teen continues to love these swim products! So easy to wash, perfect fit and material.

    Cynthia A.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    8 months 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 1 out of 5 stars
    2 years ago
    Not appropriate for tweens

    Was happy to find period swimwear advertised for teens. But what I received was SO skimpy and unable to be worn by my 12/13 year old.

    Nicole
    Verified Buyer
    Was this helpful?