Thinx Period Underwear & Absorbent Apparel

Thinx makes reusable, washable underwear built to absorb period flow, light bladder leaks, or both — no pad, liner, or tampon required. For anyone tired of single-use products, or simply looking to cut down on waste and monthly spending, this is protection you wear like ordinary underwear and toss in the laundry when you're done.

The appeal is straightforward. Each pair is engineered with layered fabric that wicks moisture away from the skin, absorbs liquid into a hidden core, and resists leaks through the outer layer — all while looking and feeling like regular briefs. Styles range from bikinis and hiphuggers to boyshorts and higher-waisted cuts, in a spread of absorbency levels so you can match lighter days to heavier ones. Many people build a small rotation: a few high-absorbency pairs for the first days of a cycle, lighter styles for the tail end or for everyday leak insurance.

Two questions come up most often. First, how much do they hold? Absorbency is labeled by the equivalent number of tampons or teaspoons, so you can choose realistically for your flow rather than guessing. Second, how do you care for them? Rinse in cold water after wearing, machine wash cold on a gentle cycle, and hang to dry — skip fabric softener and the dryer, both of which break down the absorbent layers over time. Cared for properly, a single pair lasts through years of washes, which is where the long-term savings add up.

Thinx underwear works well on its own for lighter days or as backup alongside a cup or tampon on heavier ones. It's a practical choice for teens managing their first periods, for postpartum recovery, and for anyone navigating perimenopause when flow and bladder control can both be unpredictable.

Explore the full range of styles and absorbencies to find the cuts that fit your body and your cycle.