My Bag

Sport

$32
60-day trial
+ free returns
Don’t love 'em?
Get your $ back
no questions asked
360
front
side
back
gusset
360
front
side
back
gusset
360
front
side
back
gusset
360
front
side
back
gusset
360
front
side
back
gusset
360
front
side
back
gusset
360
front
side
back
gusset

Sport

$32

wear on moderate days

holds  
worth

Size

- low stock size chart
size chart

Color

- new color

Quantity

1

Sport

buy 3, get 10% off

style + fit

Designed with a comfy, workout-friendly fit — so you can period better *and* move better.

buy more + save more

Mix and match any undies from Thinx, Thinx (BTWN), or Speax — and save a li’l $$$!

3-4 pairs 10% off, 5-6 pairs 15% off, 7+ pairs 20% off

“The Sport helps me feel sexy and remain true to my active lifestyle — I can go from dance class to nightlife without having to make major changes. ”

Nzingah from Fort Lauderdale, FL, light to heavy

style + fit

Designed with a comfy, workout-friendly fit — so you can period better *and* move better.

buy more + save more

Mix and match any undies from Thinx, Thinx (BTWN), or Speax — and save a li’l $$$!

3-4 pairs 10% off, 5-6 pairs 15% off, 7+ pairs 20% off

“The Sport helps me feel sexy and remain true to my active lifestyle — I can go from dance class to nightlife without having to make major changes. ”

Nzingah from Fort Lauderdale, FL, light to heavy

60-day trial

Try THINX for 60 days, if it doesn't help you period better, we'll give you a refund. No questions asked!

fabric

fabric

body 89% nylon, 11% elastane
gusset 95% cotton, 5% elastane; middle breathable PUL

care instructions

care instructions

To take care of your Thinx, rinse with cold water immediately after use, give ‘em a spin in the washing machine on a delicate cycle (just no softener or bleach!), and hang dry.

period underwear that works

fabric

body 89% nylon, 11% elastane
gusset 95% cotton, 5% elastane; middle breathable PUL

care instructions

To take care of your Thinx, rinse with cold water immediately after use, give ‘em a spin in the washing machine on a delicate cycle (just no softener or bleach!), and hang dry.

period underwear that works

fabric

body 89% nylon, 11% elastane
gusset 95% cotton, 5% elastane; middle breathable PUL

care instructions

To take care of your Thinx, rinse with cold water immediately after use, give ‘em a spin in the washing machine on a delicate cycle (just no softener or bleach!), and hang dry.

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FAQs

What is your return policy?

We offer free returns and exchanges within 60 days of purchase, no questions asked! Just visit the Thinx Inc. Return & Exchange Center to get started.

How do Thinx work?

Thinx are underwear that absorb your period. Every pair is made with a patented design and our signature technology that absorbs your flow, wicks moisture, controls odor, and prevents leaks — leaving you fresh and dry. Take a look at our How it Works page to learn more.

How long can I wear Thinx?

We measure our undies by absorbency with our highest absorbency styles holding 4 tampons worth of fluid. For some customers, that means wearing them the whole day and for others that may mean carrying an extra pair of Thinx as a backup. If you have more questions, please try our Know Your Flow quiz.

How do I know what size to buy?

We recommend following the hip measurement, as most of our styles sit on the hips. Be sure to measure your hips at their widest point (derriere included!) to find the most accurate size for you! In case you don't have a tape measure, you can use the size you usually are most comfortable with for your underwear. We recommend the undies fit snuggly, but not so tight that it's uncomfortable. For reference, you can check out our Thinx size chart.

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