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Teen Leakproof Cotton Bikini

$22.00 USD

Buy 3+ Save 15%, Buy 5+ Save 20%

Absorbs about 3 super tampons

Cotton-spandex fabric

Machine washable

Color: Black

Size:

True to Size

Size:

Size and Fit Guide

Build Your 3-Pack

Teen Leakproof Cotton Bikini

Color: Black

Size:

Size:

Teen Leakproof Cotton Bikini

Color: Black

Size:

Size:

Teen Leakproof Cotton Bikini

Color: Black

Size:

Size:

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

New to leakproof? Your first pair is risk free for 30 days. Wear them, wash them, and see how they work for your body. Not right for you? We'll refund the item price (original shipping excluded). Prefer a different size or style? We also offer free exchanges. Just email info@knix.com and we'll take care of you.

Purchased leakproof before? Within 30 days of delivery you can exchange for another size, style, or store credit. We're unable to provide refunds on underwear. If you ordered multiple pairs, please open, wash, and wear one pair only before initiating an exchange.

Still have questions? View our full policy here.

Rewards Members Earn 22 Points

Product Description

The perfect introduction to period-proof confidence. The Teen Leakproof Cotton Bikini combines the classic, breathable feel of soft cotton with the reliable protection of Knix technology. Designed specifically for younger bodies, this bikini absorbs about 2 to 3 tampons' worth of flow, making it ideal for school days, extracurriculars, or light-to-medium days. The slim, comfortable gusset provides a "just like regular underwear" feel, ensuring she stays dry and focused. Experience the best cotton period underwear for teens starting their journey.

Comfort-First Fit

The classic mid-rise fit provides medium hip and bum coverage.

Moderate Absorbency

The bonded floating liner absorbs approximately 3 super tampons worth of liquid.

OEKO-TEX® Certified

Certified according to OEKO-TEX® STANDARD 100, Product Class I : HK020 246396 TESTEX

Easy to Wash

Machine washable just like regular underwear.

Zoom

| Black
| Black
| Black
| General
| General

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.

Absorbs about 2-3 super tampons worth of liquid.

Soft Top Layer

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

4.5
Rated 4.5 out of 5 stars
Based on 250 reviews
Total 5 star reviews: 190 Total 4 star reviews: 21 Total 3 star reviews: 15 Total 2 star reviews: 12 Total 1 star reviews: 12
85%would recommend these products
ComfortRated 4.5 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
Rating
Ratings
Height
Height
Usual Pant Size - Knixteen
Usual Pant Size - Knixteen
Size Purchased - Knixteen Underwear
Size Purchased - Knixteen Underwear
250 reviews
  • Rated 5 out of 5 stars
    1 week ago
    Love

    My daughter loves them. She said they are very comfortable

    Tihuana B.
    Verified Buyer
    Reviewing
    Teen Leakproof Cotton Bikini
  • Rated 5 out of 5 stars
    2 weeks ago
    So soft and comfy

    I'm really gonna miss being able to get this style. The fabric was so much softer than the new cotton material and much more comfortable overall

    Jen C.
    Verified Buyer
    Reviewing
    Leakproof Cotton Bikini - Last Call
  • Rated 5 out of 5 stars
    2 weeks ago
    Very soft

    Underwear were very comfortable and easy to wear!

    Dawn D.
    Verified Buyer
    Reviewing
    Leakproof Cotton Bikini - Last Call
  • Rated 5 out of 5 stars
    2 weeks ago
    Great!

    My teen loves them. Very comfy and limit the pad usage, which is great.

    Erin N.
    Verified Buyer
    Reviewing
    Teen Leakproof Cotton Bikini
  • Rated 5 out of 5 stars
    4 weeks ago
    Comfortable!

    This is my first time purchasing the cotton version ( I usually purchase the no show leakproof bikini) and I find them very comfortable, well made and I like that I can wear them for playing sports.

    Erin N.
    Verified Buyer
    Reviewing
    Leakproof Cotton Bikini - Last Call
  • Rated 5 out of 5 stars
    1 month ago
    Love

    10/10

    Katey T.
    Verified Buyer
    Reviewing
    Leakproof Cotton Bikini - Last Call
  • Rated 3 out of 5 stars
    3 months ago
    PSA on the liner!

    FYI, the liner on this style of underwear is not fully attached to the cotton outerlayer (ie: the pink part). In turn, the liner sometimes shifts, creating zones of "non-protection". I had to DIY sew the liner to the pink part so it wouldn't slip. Liner is leakproof like all of Knix's products, just be warned with this particular model. Lover of my other leakproof underwear from Knix!

    Jo
    Verified Buyer
    Reviewing
    Leakproof Cotton Bikini - Last Call
  • Rated 4 out of 5 stars
    3 months ago
    Comfortable!

    Great quality

    Debra H.
    Verified Buyer
    Reviewing
    Teen Leakproof Cotton Bikini Kit*
  • Rated 5 out of 5 stars
    3 months ago
    Fits great

    Love the soft cotton material. Not bulky at all. Feels like regular underwear.

    Karen D.
    Verified Buyer
    Reviewing
    Teen Leakproof Cotton Bikini Kit*
  • Rated 5 out of 5 stars
    3 months ago
    Comfortable

    These are very comfortable to wear

    Shawna G.
    Verified Buyer
    Reviewing
    Leakproof Cotton Bikini - Last Call
  • Rated 5 out of 5 stars
    3 months ago
    Perfect!

    These are amazing. Very comfy while giving me peace of mind. I've been slowly replacing all of my regular underwear with Knix!

    Alisa R.
    Verified Buyer
    Reviewing
    Leakproof Cotton Bikini - Last Call
  • Rated 2 out of 5 stars
    3 months ago
    2 Stars

    I am not happy with the construction of these pants. I have bought Knix bikinis for years, and I always found them quite comfortable. I don't know why they changed the way that the pad is connected to the rest of the panty. There is a distinct and uncomfortable crease on the backside of the panty. It causes irritation on my backside. I will be looking for panties somewhere else in the future.

    Jean
    Reviewing
    Leakproof Cotton Bikini - Last Call