a new generation of period care

Thinx for All reflects our goal of giving more people access to better periods! To offer this period-absorbing underwear at a more accessible price point, we value-engineered a more streamlined cotton fabric body in select styles, colors, and absorbencies.

Thinx for All is a curated collection of single-lined cotton underwear for periods in our most popular colors & absorbencies, to make period underwear more accessible for all. Thinx is our line of period underwear & apparel, available in exclusive silhouettes and premium fabrics like luxe mesh and Modal Cotton.

Thinx is machine-washable and reusable period-absorbing underwear — providing a more sustainable alternative to single-use disposable products. Thinx underwear styles are available in a range of absorbencies, up to 5 regular tampons’ worth of flow, to support every stage of your cycle. Every pair of Thinx period-absorbing underwear features our signature, innovative built-in technology — a moisture-wicking top layer, an absorbent core layer, and an outermost leak-resistant barrier. Check out our How Thinx Work page to learn more.

Every flow is different! You can wear period-absorbing underwear for as long as your flow will allow. And of course, the absorbency style you wear also plays a factor. Depending on your flow, you may need a higher absorbency style or need to switch pairs more often. For many, Thinx can last all day! When you’re starting a new period routine with our underwear, we recommend trying them first at home — where you can comfortably get a feel for how they work for your body. If you're unsure which styles to start with, we recommend taking our Know Your Flow quiz.

We recommend following the hip measurement to find the most accurate size. Be sure to measure your hips at their widest point, derrière included! We recommend sizing up in underwear styles that fit below the natural waist. Check the fit details of each underwear style via our size chart. The underwear should fit snugly but not so tight that it becomes uncomfortable.

Depending on your flow, Thinx can be a total replacement for menstrual products, such as pads, tampons, panty liners, and cups. Our highest absorbency styles hold up to 5 tampons worth of flow. For most flows, Thinx can last all day! Others may choose to carry an extra pair of Thinx as a backup, just in case! If you're unsure which styles to start with, we recommend taking our Know Your Flow quiz.