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Color: Black
Best Seller

Color: Black

Size:

Size:

Size and Fit Guide

Mix & Match: 3+ for $20 each
Rewards Members Earn 0 Points
Best Seller

Teen Period Swim Full-Coverage Bikini Bottom

$55.00 CAD

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Absorb about 2 super tampons

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Lower to mid-rise fit

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Full coverage style

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Premium UPF 50+ fabric

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Machine washable

| Black
| Black
| Black
| Black
| Black
Felixe (she/her) has 44” hips and is wearing a size XL | Black

Felixe (she/her) has 44” hips and is wearing a size XL

Felixe (she/her) has 44” hips and is wearing a size XL | Black

Felixe (she/her) has 44” hips and is wearing a size XL

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.

Rewards Members Earn 55 Points

Swim in Style

A full coverage style with a mid-rise fit and full bum coverage.

Worry-Free Protection

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

Stay Sun-Safe

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

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| Black
| Black
| Black
| Black
| Black
Felixe (she/her) has 44” hips and is wearing a size XL | Black
Felixe (she/her) has 44” hips and is wearing a size XL | 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.

4.6
Rated 4.6 out of 5 stars
Based on 102 reviews
Total 5 star reviews: 81 Total 4 star reviews: 13 Total 3 star reviews: 1 Total 2 star reviews: 3 Total 1 star reviews: 4
92%would recommend these products
ComfortRated 4.7 on a scale of 1 to 5
FitRated -0.1 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
102 reviews
  • Rated 1 out of 5 stars
    2 weeks ago
    Product never arrived 19 days and counting

    Product never has arrived. It’s been stuck with USPS since August 5th and the postal service can’t figure out where it’s at and the Knox customer service rep didn’t offer any help or advice either. So here I sit for 19 days now being charged for something I never received. No refund no offer to send again nothing. Totally disappointed by this purchase process and the lack of support along the way.

    Julie S.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Great swim bottom

    Looks great and works vey well. It's generic enough to mix & match with different tops. I got a couple of them so she can just change them without changing the top.

    Parastoo G.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Looks cute, works great

    These swim bottoms were a life saver on our vacation! They work extremely well and they are super cute.

    Susan K.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Perfect fit and very discreet

    Perfect fit and very discreet. My daughter loved it.

    Gabrielle L.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Great for teens

    Very happy with our order. We needed to exchange for a larger size and Knix was extremely helpful.

    Andrea T.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Great fit!

    Bought this for my Daughter- she has particular tastes-she loves it! Looks cute, fits well. Good quality.

    Erin B.
    Verified Buyer
  • Rated 4 out of 5 stars
    1 month ago
    Camp approved

    Bikini bottom was great for camp. Easy to mix and match tops. Looks good, feels good, works well too!

    Erika D.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Nice fit

    My daughter loves these. They fit well and she likes the pattern on them.

    Deanne G.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    This worked great for my daughter and helped her feel confident to swim while she had her period.

    Kathryn
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Incredible pirchase! Worth every penny

    An absolute beach lifesaver!

    Amanda L.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    good 👍🏻

    great quality

    Abigail W.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Teen Period Swim Full-Coverage Bikini Bottom

    My daughter likes these swim bottoms. Very effective, comfortable and they work with all her swim tops.

    Amanda S.
    Verified Buyer