Our underwear for periods absorbs your flow, helps control odor, wicks moisture, and helps prevent leaks — so you feel fresh, dry, and comfortable throughout the day! No other period products are required. Our period-absorbing underwear is machine washable and reusable— so you can wear, wash, and wear again!

Our newest period-absorbing underwear styles hold up to 12 regular tampons' worth of flow and are leakproof all day up to 12 hours. No other period products are needed.

Our newest period underwear styles feature our all-day leakproof absorbency for up to 12 hours of period protection. No pads, tampons, or other period products are needed.

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, or if you're looking for the best fit postpartum. The underwear should fit snugly but not so tight that it becomes uncomfortable.

Wash your period underwear before wearing them. Machine wash with like colors on cold, line dry, and repeat. Do not iron, bleach, or dry clean. Replace your Thinx at 30 washes. Visit our How to Wash page for more details.

We offer a 45-day trial on all orders, so if you’re unhappy with your purchase, we’ll try to make it right. Final sale items, Thinx “merch”, and gift cards are nonrefundable. Visit our online Returns Portal to begin a return or exchange.