About Proof

Proof® Teen period underwear look and feel exactly like your comfiest undies, but they have built-in leakproof® technology designed to help keep you leak-free and feeling dry while on your period. The quick-dry lining helps pull moisture away from the body to fight odors for all-day comfort. The underwear’s Leak-Loc® edges help keep leaks contained. Plus, Proof Teen panties are machine-washable and reusable, which makes them way better for the environment. 

Our leakproof underwear was made to keep you feeling confident and odor-free, no matter what time of the month. A moisture-wicking lining helps fight odors. If you ever feel like your Proof® Teen panties need a refresh, add a few drops of vinegar or tea tree oil to your washing machine during the rinse cycle. 

Yes! Proof® undies can completely replace pads, pantyliners, and tampons. We offer absorbencies that range from super-light to super-heavy (just like tampons!). Our most absorbent panties hold up to 5 regular tampons or 10 teaspoons of liquid. Fun fact: That’s more than the average woman loses during her entire cycle!

Absolutely! Proof® Teen undies can serve as a backup for a tampon or menstrual cup to provide extra protection. The most absorbent pairs can hold up to 5 regular tampons or 10 teaspoons of liquid.

100%. It’s a huge part of why so many people love them! Proof Teen period underwear are machine washable and reusable—a win for the planet and your wallet, especially compared to expensive single-use period products. Plus, they’ll be ready and waiting in your panty drawer for whenever your period strikes again. 

Absolutely! Our Proof® Teen line was designed to keep you comfy, dry, and leak-free during all your favorite activities. We recommend throwing an extra pair in your gym bag so you’ll be ready to go whenever it’s game time.


You can hand wash in cold water, or just toss them in your washing machine on the gentle cycle with cold water and a mild detergent. Hang them up or lay flat to dry to preserve the leak-protective properties. Check out the care instructions for more detailed info. 

Depending on absorbency level and humidity level, Proof® undies can take between 6 and 24 hours to dry. To expedite the drying process, blot away excess moisture before laying flat or hang drying. 

Just like most intimates, how long they last depends on how well you care for them. Proof® undies are comparable with other undies and last between 2-3 years on average. Be sure to follow our care instructions to help your undies last even longer. 

Period Questions

A menstrual period happens when the body releases tissue it no longer needs. This tissue comes from the uterus, which is where, if you were to become pregnant, a fetus would develop. Every month or so, the uterine lining gets thicker to prepare the body for egg fertilization and potential pregnancy. When a woman does not get pregnant, the lining sheds in the form of blood and tissue.

Most periods last between 3 and 7 days. The first day might be light and then build up to a heavier flow as your uterine lining sheds. Then, on the last day or two, you might just see some spotting. Proof® Teen has a style for every day of your cycle, no matter how light or heavy. On your lightest days—or in between periods—they’re also the perfect eco-friendly replacement for pantyliners. 

Most people lose between 6 to 8 teaspoons total throughout their entire period! Proof® Teen period underwear will help keep you feeling dry and confident for the duration of your period. Also, your flow is unique to you, so don’t worry if your friend’s periods are super light and yours aren’t. Remember: Every body is different! 

Absolutely not! At any given moment, one out of three women are on their period, and you’d likely never know it. While some period products can feel bulky or conspicuous, chances are nobody’s actually noticing them but you. However, comfort is everything—that’s why we designed Proof® Teen period underwear to do it all without you having to constantly worry if anyone can tell you’re on your period. Proof® Teen period underwear is incredibly comfortable, leakproof, and thin enough to stay hidden. Nobody will know you’re wearing them but you (and they’re super cute, too!).

Your period can change over time. This is due to your hormones and other factors that can have an impact on your flow from month to month, or year over year. Usually, periods are fairly consistent, though, and you’ll get familiar with your cycle and know a bit more about what to expect as the months go by.

Customer Service

While we try to keep our shelves well-stocked, sometimes a style is so popular that it sells out! 

If you're loving a style that's out of stock, you can sign up for alerts to be notified as soon as more inventory arrives. Choose the style, color, and size you would like, and select 'Notify When In Stock' then enter your email address and phone number to be alerted as soon as your favorites are back in stock! 

Our 60-day money back guarantee is our way of saying, we know you’re going to love Proof undies - but, if for whatever reason you are unsatisfied or our products do not meet your expectations, you can return them within 60 days for a full no-questions asked refund! The 60-day money back guarantee is for all first time orders only made on shopproof.com.

*60 days from the time of receipt of order.

Click the link below and enter your Order Number or Email to begin your return.

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