Modal Cotton

Final Sale 50% off

Modal Cotton Brief

Original Price

$35

Sale Price

$17.50

Thinx underwear is not made or treated with PFAS

Thinx underwear is not made or treated with PFAS

absorbency heavy

holds4
worth.
colorBlack

 - final sale*

Select a color

size

size chart

buy 3, save 10%

Buy 3-4 pairs for 10% off

Buy 5-6 pairs for 15% off

Buy 7+ pairs for 20% off

Savings are applied automatically during checkout. Our custom Set discount applies to Thinx period underwear and Thinx for All Leaks bladder leak underwear (but excludes Saver Sets).

buy 3, save 10%

Buy 3-4 pairs for 10% off

Buy 5-6 pairs for 15% off

Buy 7+ pairs for 20% off

Savings are applied automatically during checkout. Our custom Set discount applies to Thinx period underwear and Thinx for All Leaks bladder leak underwear (but excludes Saver Sets).

*final sale items are not eligible for returns or exchanges.

style

A comfy, full-coverage silhouette made from eco-friendly Modal Cotton that protects against leaks, even on heavy days.

Thinx underwear is not made or treated with PFAS.

fit

This style has an extended gusset for extra front-to-back coverage and fits true to size, so we recommend ordering your usual size.

Thinx - Cotton Brief - Style+Fit.jpg
Wear this on moderate to heavy days for leak protection that's cozy and buttery-soft (perfect for lounging!).

fabric

  • body/liner: 53% SUPIMA® Cotton, 35% TENCEL™ Modal, 12% elastane
  • gusset 1 (wicking): 100% polyester
  • gusset 2 (absorbent): 96% cotton, 4% elastane
  • gusset 3 (barrier): 100% polyester, coated w/ breathable PU
  • cotton, elastane, polyester, polyurethane, Agion®, Lava XL-N®
  • Thinx underwear is not made or treated with PFAS.

Our underwear is certified according to STANDARD 100 by OEKO-TEX:registered: [20.HUS.04850 | HOHENSTEIN HTTI]

care instructions

Wash before wearing. Hand wash or machine wash cold on a delicate cycle. Do not use bleach or fabric softener. Hang dry — no ironing please!

Thinx Modal Cotton illustration

Modal Cotton

Our buttery-soft Modal Cotton blend of SUPIMA®️ Cotton and TENCEL™ Modal is perfect for feeling *extra* cozy on your period.

My absolute favorite pair. They’re soft, breathable, and don’t irritate my skin. If you don’t know where to start, start with these!
Neha from Denver, CO, moderate to very heavy flow

how our period underwear works

Thinx - PDP - take the Know Your Flow quiz

find your style

Tell us a li'l bit about your flow, and we'll match you with the right pair!

Thinx - PDP - create a set

buy more, save more

Mix and match any Thinx undies — and you can save up to 20%.

FAQs