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Home / Teen Period Underwear / Teen Leakproof UltraThin No-Show Boyshort 3-Pack
KnixTeen

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$65.00 USD

$72.00

Save $7
Checkmark

Absorbs about 2.5 super tampons

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Invisible under clothes

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Superior protection without the bulk

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Machine washable

| Strawberry Field/Sweet Tea/Baby Blue
| Strawberry Field/Sweet Tea/Baby Blue
| Strawberry Field/Sweet Tea/Baby Blue
| Strawberry Field/Sweet Tea/Baby Blue

Absorbency: Moderate

Moderate
about 2-4 super tampons
Light
about 1-3 regular tampons
Heavy
about 4-7 super tampons

Color: Strawberry Field/Sweet Tea/Baby Blue 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. 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.
First Pair Risk Free for 30 Days

Leakproof Underwear, Risk Free

Returns & Exchanges

Leakproof Underwear, Risk Free
Trying leakproof underwear for the first time? Your first pair is completely risk free for 30 days. Wear them, wash them, and see how they work for your body. If they’re not right for you, we’ll refund your first pair. Prefer a different size or style? We also offer free exchanges.

How it works:

  • Risk free applies to leakproof underwear on your first order
  • Refund covers the item price (original shipping excluded)
  • Just email info@knix.com and we’ll take care of you

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

Hanging out or running to your next class? These period undies provide the ultimate comfort you want, plus ultra-thin protection you need from sweat, discharge and leaks. It’s a classic silhouette made with a super soft-and-stretchy, quick-drying material. It absorbs about the equivalent of 2.5 super tampons for an extra dose of confidence on those medium-flow days.

Comfort-First Fit

Boyshort silhouette with a mid-rise fit and extra hip and bum coverage.

Worry-Free Protection

Our newest leakproof innovation provides more absorbency without the bulk. Patented 360 LeakSeal™ technology locks in leaks at every edge.

Moderate Absorbency

Absorbs 2.5 super tampons worth of liquid—perfect for moderate flow days, light bladder leaks, and sweat. The carbon cotton gusset top layer keeps you dry.

No-Show Style

Buttery-soft and smooth fabric gives a seamless look and feel. Disappears under clothes, even leggings.

Easy to Wash

Machine washable just like regular underwear.

Zoom

| Strawberry Field/Sweet Tea/Baby Blue
| Strawberry Field/Sweet Tea/Baby Blue
| Strawberry Field/Sweet Tea/Baby Blue
| Strawberry Field/Sweet Tea/Baby Blue

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
FRESH FIX TECHNOLOGY®

Built-in protection that feels like nothing at all.

Our patented 360 LeakSeal™ technology locks in leaks at every edge. The ultra-thin liner absorbs about 2.5 super tampons worth of liquid.

Soft Top Layer

Soft Top Layer

Gently wicks away moisture while keeping you feeling fresh and odor-free.

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Teen First Period Kit - Bikini

From 
$144.00 USD
$192.00
Save $48
4.5
Rated 4.5 out of 5 stars
Based on 34 reviews
Total 5 star reviews: 25 Total 4 star reviews: 4 Total 3 star reviews: 3 Total 2 star reviews: 1 Total 1 star reviews: 1
88%would recommend this product
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 4.8 on a scale of 1 to 5
Write a Review (Opens in a new window)
34 reviews
  • Rated 5 out of 5 stars
    23 hours ago
    Love these

    My 9 yr old loves them. Easy to wash, perfect fit, we'll be buying more for sure

    Monique D.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    first time

    bought for my daughter. she LOVED them. Everyday wear and so easy to wash.

    Carolyn B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 weeks ago
    Nice fit

    I wish the underwear were priced more affordably. I love Nick‘s, but their prices are still too high.

    bobbie s.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 weeks ago
    My favorite undies

    Medium absorbency is the way to go … in a Goldilocks kind of way. It’s so much more comfortable than the light and super ones. I use for sweat and urgency back-up. I hope these never go away. Would be thrilled to see more colors to add to my cheery underwear drawer.

    C J. L.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    happy teenager

    My teen is grateful she doesn't have to wear bulky pads anymore. she is very confident wearing these!

    Tiffany s.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Happy tween! Happy mom! Love these products!!

    Amanda
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Great fit and function

    I am definitely not a teen (in my 30’s) but I like the fit on these better than my regular Knix leakproof. For size reference, I’m 5’3” 120 lbs and a pant size 4. I purchased a Medium and the size was perfect!

    Ashley H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 months ago
    My daughter loves them!

    My daughter just started her period and the Knix Teen underwear help her feel so much better knowing she doesn’t have to worry about any leaks or embarrassing moments!

    Jane P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 months ago
    Parfait!

    Pratique, écologique et efficace! Ma fille adore!

    Christine B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 months ago
    Teen leakproof

    The fabric is soft and breathable and comfortable and easy to washed!

    Marites C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    5 months ago
    Great quality and peace of mind

    Purchased for young teenager. She loves them so much she requested we buy more. Wish I'd had this option growing up!

    Joanne C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 months ago
    Cute and comfy

    No more leaks.

    Amber W.
    Verified Buyer
    Was this helpful?