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Absorbs up to 4 tampons Absorbency Badge for a product
Shop / Fresh Start Period Kit
Brief
Bikini
Shorty
Brief
Bikini
Shorty

Fresh Start Period Kit

$59.00

A mix of our 3 styles (Brief, Bikini, and Shorty) to last your entire cycle.

  • - Absorbs up to 4 tampons’ worth (36mL)
  • - Made from organic cotton
  • - Specially designed to fit tweens & teens
  • - Tag free!

 

Size *only a few left*
Youth Size Guide
Combos

1 Brief

1 Bikini

1 Shorty

– +

is on back order.
This item will ship

Please note, items in size will not come in the box shown. They will ship as 3 single items in one package.

A mix of our 3 styles (Brief, Bikini, and Shorty) to last your entire cycle.

  • - Absorbs up to 4 tampons’ worth (36mL)
  • - Made from organic cotton
  • - Specially designed to fit tweens & teens
  • - Tag free!

 

60-day trial
Try Thinx (BTWN) for 60 days and if it doesn’t help you period better we’ll give you your money back — no questions asked!
Body
95% organic cotton, 5% elastane
Gusset
100% Polyester, breathable PUL
Our underwear has been successfully tested for harmful substances and certified according to STANDARD 100 by OEKO-TEX®️ [20.HUS.04850 | HOHENSTEIN HTTI]
To take care of your Thinx (BTWN), machine wash on cold and hang dry. Do not iron, bleach, or use fabric softener.

What's My Size?

Thinx (BTWN) are true to size for teens and tweens' underwear and clothes.

Inches

Centimeters

Size Natural Waist Lower Waist Hip
9-10 23¾-24½60-62 27-2868.5-71 29-30¼73.5-77
11-12 24¾-25¼63-64 29¼-30½74-77 31½-3380-84
13-14 26-26½65.5-67 31¾-3380-83 34½-3688-92
15-16 28-29¼71-74 34½-3687-91 37½-3996-100

How to find the right size

Getting measurements for the perfect fit is as easy as 1, 2, 3! All you need is a tape measurer to get started.

1. Natural Waist

Begin by measuring the smallest area of the torso — right above the belly button and below the ribcage.

2. Lower Waist

Then, make a measurement slightly below the natural waist (where a pair of pants would normally sit).

3. Hip

Finally, measure the widest part of the hips. You're all set!

Thinx(BTWN) size chart

How do Thinx (BTWN) work?

How do Thinx (BTWN) work?

Made to absorb menstrual flow, wick moisture, control odor, and prevent leaks and stains, Thinx (BTWN) can replace or back-up other period products.

Learn more
Fresh Start Period Kit
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FAQs

( Q )
Will there be stains on my Thinx (BTWN)?
( A )
Nope. The interior of the underwear is lined with black fabric, so you never look down and see stains.
( Q )
How many pairs of Thinx (BTWN) do I need?
( A )
Some people buy a Fresh Start Period Kit so they have multiple pairs to last their entire cycle, others just buy one pair and wash it at night before wearing the next day — it’s up to you!
Got more Qs? We’ve got you covered.
More FAQS

Check out our other styles

Bikini

$23.00

Absorbs up to 4 tampons Absorbency Badge for a product

Shorty

$23.00

Absorbs up to 4 tampons Absorbency Badge for a product

Brief

$23.00

Absorbs up to 4 tampons Absorbency Badge for a product