A mid-rise style with minimal coverage, our Leakproof Thong Period Underwear is a style you know and love, expertly designed to have your back for light periods and spotting. So comfortable, you'll forget you're even wearing it (because we know you don't want to skip your workout class). Crafted with our Leak-Loc® absorbent core technology that helps you feel confident.

Our leakproof, period-proof thong was designed with comfort in mind. Created with buttery-soft, stretch fabric that moves with the body and a thin, flexible absorbent core helps keep you comfortable, day or night.

We typically advise buying your normal underwear size for the thong. For a more generous, high-rise fit, you may like a size up. For more size guidance, check out our size guide.

Yes! Our thong is great for everyday wear, as it provides light ‘back up’ protection for all of those in-between days. Smooth, seamless edges vanish under clothing to provide a sleek look under clothing.

The leakproof thong undie was designed with light periods in mind. If you have a light flow, the thong will help pull moisture away from the body and into the Leak-Loc® core which holds up to 1 regular tampon.

The leakproof thong is available in black or sand. These color thongs are a staple to every women’s wardrobe - order both. You won’t regret it.

Yes and yes! Proof really has you covered. Our leakproof undies are designed with several layers of moisture-wicking, absorbent materials that help pull moisture away from the body and into an absorbent core. They are designed to wick away sweat and moisture whether you're in the middle of a workout class or taking an afternoon stroll.

Proof’s leakproof thong can be worn every day, period or not. Our leakproof thongs can help prevent leaks during your period, but can help absorb sweat, discharge, or spotting as well.

All of Proof’s leakproof thongs and undies can be worn while working out. In fact, we recommend doing so. Whether you’re on your period or not, the leakproof thong can offer several benefits while working out. It can help absorb sweat while keeping you focused on your workout.

Slip on the leakproof thong and worry about what’s important in life, not your underwear. Besides, it’s so comfortable you’ll probably forget you are even wearing it. The real proof though, is in our reviews!

It’s up to you! Some women choose to wear the Proof period thong with a tampon, pad, or cup as back up, or you can wear the undie solo on light spotting days. The thong absorbs up to 1 regular tampon worth of flow to help you feel confident.