how Thinx work

Everyone's flow is different, so you can wear Thinx for as long as your flow will allow. And of course, the style you wear also plays a factor, as some styles are more absorbent than others. We measure our undies by absorbency with our highest absorbency styles holding 5 regular tampons' worth. So 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're still unsure, we recommend taking our Know Your Flow quiz.

Our absorbent styles hold from 1 regular tampon worth of flow to 5 regular tampons worth of flow, so there is a style right for each day of your cycle. We recommend trying Thinx period-absorbing underwear for the first time at home to see how each underwear style works with your ~flow~.

One way to tell that your period-absorbing underwear is full is if the side seam of the gusset feels wet. When you start to notice blood at the seams, this is a good indication that it's time to change pairs! We suggest bringing along a resealable bag, pouch, or wet bag — so that if you do need to change out of your first pair of Thinx undies, you've got a place to put them.

Thinx period-absorbing underwear handles blood clots similarly to a pad. Although the undies can't absorb the blood clot itself, they will absorb the surrounding moisture so you will not feel damp, wet, or uncomfortable.