Teen Period Underwear

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 Moisture-wicking, odor-crushing, life-changing leakproof undies.

  • Black
Super Leakproof® Sleepover Short
Heavy Absorbency
$33.15 USD $39 USD 15-40% OFF
  • Black
Leakproof UltraThin No-Show Underwear Bikini
Medium Absorbency
$18.70 USD $22 USD 15-30% OFF
  • Black
Super Leakproof® No-Show Underwear Boyshort
Heavy Absorbency
$21.25 USD $25 USD 15-40% OFF
New
  • Comet/Atmosphere/Starstruck
UltraThin Bikini: Holiday 3-Pack
Medium Absorbency
$46 USD $66 USD 30% OFF
  • Black
Light Leakproof No-Show Underwear Bikini
Lightest Absorbency
$16.15 USD $19 USD 15-40% OFF
  • Shady Blue
Light Leakproof No-Show Underwear Boyshort
Light Absorbency
$11.40 USD $19 USD 15-40% OFF
  • Black
Super Leakproof® Sleepover Short
Heavy Absorbency
$33.15 USD $39 USD 15-40% OFF
  • Black
Leakproof UltraThin No-Show Underwear Bikini 3-Pack
Medium Absorbency
$39 USD $66 USD 15-40% OFF
  • Black
Leakproof UltraThin No-Show Underwear Boyshort 3-Pack
Medium Absorbency
$56.10 USD $66 USD 15-40% OFF
  • Black
Leakproof UltraThin No-Show Underwear Bikini
Medium Absorbency
$18.70 USD $22 USD 15-30% OFF
  • Black
Leakproof UltraThin No-Show Underwear Boyshort
Medium Absorbency
$18.70 USD $22 USD 15-30% OFF
  • Black
Leakproof Cotton Underwear Bikini
Medium Absorbency
$17 USD $20 USD 15% OFF
  • Black
Light Leakproof No-Show Underwear Bikini 3-Pack
Light Absorbency
$48.45 USD $57 USD 15-40% OFF
  • Black
Light Leakproof No-Show Underwear Boyshort 3-Pack
Light Absorbency
$48.45 USD $57 USD 15-40% OFF
  • Black
Super Leakproof® No-Show Underwear Bikini
Heavy Absorbency
$21.25 USD $25 USD 15-40% OFF
  • Black
Leakproof Luxe Modal Sleep Boxer
Medium Absorbency
$24.65 USD $29 USD 15-30% OFF
  • Black
Light Leakproof No-Show Underwear High Rise
Lightest Absorbency
$18.70 USD $22 USD 15% OFF
  • Black
Super Leakproof® No-Show Underwear High Rise
Heavy Absorbency
$23.80 USD $28 USD 15-40% OFF
  • Black
Super Leakproof® No-Show Underwear Bikini 3-Pack
Heavy Absorbency
$63.75 USD $75 USD 15-40% OFF
  • Black
Super Leakproof® No-Show Underwear Boyshort 3-Pack
Heavy Absorbency
$63.75 USD $75 USD 15-40% OFF
New
  • Black
Travel Bag
$12.75 USD $15 USD 15% OFF
Leakproof UltraThin No-Show Underwear 4-Pack - Daydreamer
Medium Absorbency
$74.80 USD $88 USD Save 15%
Leakproof UltraThin No-Show Underwear 4-Pack - Sporty
Medium Absorbency
$74.80 USD $88 USD Save 15%
Light Leakproof No-Show Underwear 4-Pack - Sporty
Lightest Absorbency
$64.60 USD $76 USD Save 15%
Light Leakproof No-Show Underwear 4-Pack - Daydreamer
Lightest Absorbency
$64.60 USD $76 USD Save 15%
Super Leakproof® Underwear 4-Pack - Classic Prep
Heavy Absorbency
$85 USD $100 USD Save 15%
Super Leakproof® Underwear 4-Pack - Y2K
Heavy Absorbency
$85 USD $100 USD Save 15%
  • Black
Super Leakproof® Sleepover Short
Heavy Absorbency
$33.15 USD $39 USD 15-40% OFF
Leakproof UltraThin No-Show Underwear 4-Pack - Classic Prep
Medium Absorbency
$74.80 USD $88 USD Save 15%
Leakproof UltraThin No-Show Underwear 4-Pack - Y2K
Medium Absorbency
$74.80 USD $88 USD Save 15%
Leakproof UltraThin No-Show Underwear 7-Pack - Classic Prep
Medium Absorbency
$107.80 USD $154 USD 30% off
Leakproof UltraThin No-Show Underwear 7-Pack - Sporty
Medium Absorbency
$107.80 USD $154 USD 30% off
Leakproof UltraThin No-Show Underwear 7-Pack - Y2K
Medium Absorbency
$107.80 USD $154 USD 30% off
Starter Underwear 4-Pack
Light - Heavy Absorbency
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$103.70 USD $122 USD Save 15%
nothing is tmi here—we promise.
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Heavy Absorbency

Absorbs about the same as 3 super tampons. Perfect for overnight protection or your teens heaviest days when changing into a fresh pair might not be convenient.


Medium Absorbency

Absorbs about 2.5 super tampons' worth of blood. Ideal for medium period days, discharge and sweat.


Lightest Absorbency

Absorbs about the same as about 1 regular tampon worth of blood, sweat or discharge. Ideal for lightest period days, spotting, sweat and discharge.

Each pair has a built-in liner that absorbs period blood. Kt Period Underwear is categorized by lightest, medium and heavy flows so you can find the right pair for your teen’s needs.

All of our period underwear, swimwear, reusable pads, and activewear have our patented leakproof technology built right in. Liner’s are discreet and comfortable, and fit for your teen’s unique flow. 

That’s up to your teen or tween! Every flow and comfort level is different.

Depending on the absorbency level of the period underwear and the heaviness of your teen’s flow, they can wear our period undies on their own or as a backup to tampons or menstrual cups. 

We always recommend they choose an option that makes them feel most confident!

Step 1: Give your teens underwear a quick rinse under cold water.

Step 2: Throw it in the washing machine with your regular clothes. Wash on cold with mild detergent (no softener or bleach).

Step 3: There are two ways to dry them depending on the undies you have: lay flat to dry for medium absorbency products, or tumble dry on low for high to super absorbency products.

Step 4: That’s it! No ironing needed.

Check out our size chart here. If you want some help, we have virtual fitters ready on deck to help your teen find their perfect fit. Book a video call with them today.

Because they’re, well, underwear, we can’t accept exchanges or returns on used items. BUT your teen can try their first pair on your first order risk-free for 30 days!

If you ordered the wrong size of period underwear, we’ll send you a different pair at no cost or offer you a standard refund within 30 days of delivery (excluding original shipping fees).

If your order included multiple period underwear, open, wash, and wear one pair only. That way if you don’t love them, any unopened packages from the same purchase will be eligible for an exchange or standard refund (excluding original shipping fees).

All unopened packages will be donated to local organizations to support people in need.