Skip to content

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
KnixTeen

Teen Period Swim Board Shorts

$55.00 USD

Absorbs about 2.5 super tampons

Mid-rise fit

Full coverage style

Premium UPF 50+ fabric

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

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

| General
| Black

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. 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.


Split Shipments

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. Delivery timelines do not include processing times. See above for details. 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.

We are not able to ship to US territories (including Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands and American Samoa) at this time.

Easy Returns within 30 Days

Clothing & Swim

Returns & Exchanges

Leggings, sweats, t-shirts, sleepwear, and swim items are eligible for return or exchange within 30 days of delivery with tags attached. Swim bottoms and pieces must have the original sanitary strip intact.

Still have questions? View our full policy here.

Rewards Members Earn 55 Points

Product Description

The ultimate sporty solution for water-bound days. The Teen Period Swim Board Shorts are designed for the teen who loves to surf, dive, and play beach sports. Featuring a built-in leakproof liner that absorbs about 3 tampons' worth of flow, these shorts offer 360-degree security both in and out of the water. The relaxed fit provides extra coverage for the hips and thighs, while the quick-dry fabric ensures you won't feel weighed down. Experience the best period-proof board shorts for teens and stay active all summer long.

Swim in Style

A comfortable mid-rise swim shorts with a wide waistband and maximum bum coverage.

Worry-Free Protection

Discreet, built-in protection that absorbs about 2.5 super tampons worth.

Sun-Smart Protection

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

Zoom

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

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
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.

Top Layer

Smooth and comfortable liner in swimsuit fabric.

4.5
Rated 4.5 out of 5 stars
Based on 40 reviews
Total 5 star reviews: 29 Total 4 star reviews: 5 Total 3 star reviews: 5 Total 2 star reviews: 0 Total 1 star reviews: 1
What our customers are saying
Customers say these swim shorts are comfortable and versatile for water activities. Many reviewers mention the shorts provide good coverage and boost confidence while swimming. The quick-drying material works well for various activities. Common feedback notes sizing runs large, with several users recommending sizing down. While most find them comfortable for everyday wear, some mention the fit is looser and more relaxed. Reviews indicate they pair well with various swim tops and can be worn as regular shorts.
88%would recommend this product
ComfortRated 4.8 on a scale of 1 to 5
FitRated 0.1 on a scale of minus 2 to 2
EffectivenessRated 4.4 on a scale of 1 to 5
Keywords
Keywords
Rating
Ratings
Height
Height
Usual Pant Size - Knixteen
Usual Pant Size - Knixteen
Size Purchased - Knixteen Underwear
Size Purchased - Knixteen Underwear
40 reviews
  • Rated 5 out of 5 stars
    2 months ago
    love

    loved this for my daughter and I on our family vacay. love the pockets and the liner felt secure in place. no stress of mishaps.

    Carolyn B.
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 4 out of 5 stars
    3 months ago
    Great swim shorts

    My teen found these so comfy. And they wash up easy and dries fast!

    Renata D.
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 5 out of 5 stars
    4 months ago
    Great swim shorts. Not just for Teens

    Got these for a vacation where lots of walking and water would be involved and was so happy with this purchase. I sized up from usual knix size, but probably could have just got the same size. These shorts are great, I didnt really used them for period needs but thats a great benefit too. They dry very fast, are not tight around larger thighs (which is awesome) and overall I was so happy I grabbed these on sale. If Knix sold a pair of swim shorts I would've got them there but the teen options are where its at.

    Whitney C.
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 5 out of 5 stars
    4 months ago
    Great Swim Short

    Inner liner makes you feel secure. Shorts fit well.

    Thuy F.
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 5 out of 5 stars
    8 months ago
    Everything I was promised!

    These shorts are SUPER comfortable and secure. I got them in Wave Pool and the color matches its online portrayal beautifully:) Can be worn with any assortment of swim tops or honestly as normal shorts as well. As someone who often feels insecure in swimsuits, these are a stylish relief to have in my wardrobe!!

    Clara L.
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 5 out of 5 stars
    9 months ago
    Perfect for water activities

    Perfect for being active outside and doing water activities. Fit well, even on an adult. Slightly lower rise.

    Robyn W.
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 5 out of 5 stars
    9 months ago
    My teen loves these!

    We’ve bought these every year as she’s grown. She loves them and feels confident to swim every day of the month. I highly recommend!!

    Jennifer H.
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 5 out of 5 stars
    10 months ago
    Exactly what I needed

    I am almost 30 and was looking for something looser fitting for swimming so based on other reviews I figured I would try these and I was pleasantly surprised! I sometimes even just wear them around the house because they are comfy. Might be buying other colours. I am usually a medium but sized up to a large and they fit great

    Kara
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 3 out of 5 stars
    1 year ago
    Baggy

    The fit on these are very loose and baggy. My daughter is reluctant to wear them. Also, they’re still only good for medium-light days. They’re big enough that it would be nice to have heavy flow protection.

    Cory W.
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 5 out of 5 stars
    1 year ago
    Perfect

    Seeing as these are not offered in the womens line I took a chance an ordered. I'm 46 yrs old and wanted something more then a bikini bottom or cycling short for aquafit. I normally wear between a med/large and played it safe and ordered the xl. Now they do fit a little big but thankfully can tighten with the waist string and I only wear these on my light days cause I'm a little too self conscious on heavier days. But I absolutely love these shorts and wish they were around when I was a teen.

    Tanya
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 3 out of 5 stars
    1 year ago
    These look great.... and adults want them too!

    Would love to see these offered in adult sizes. And also in a longer inseam length. Many of us feel more comfortable with something less revealing around our bodies when we're at the beach. For period swim, I'd love to see a form fitting liner and a baggier board short outer layer. Thanks!

    Meg
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts
  • Rated 5 out of 5 stars
    1 year ago
    Teen swim shorts review

    My dtr really enjoys her swim shorts. They give her confidence when swimming and have been very helpful this summer!

    Breanne D. J.
    Verified Buyer
    Reviewing
    Teen Period Swim Board Shorts