Quick answer? A lot.

Proof underwear are a reusable alternative to single-use plastic disposables like pantyliners, pads, and tampons. Additionally, they are safer than tampons - as Proof undies are not an internal use product - and will not cause Toxic Shock Syndrome. We use only the highest quality materials when constructing our underwear - so you’re covered and comfortable, all day.

Ohhh yeah. Our lighter absorbency pairs are excellent for every day wear, when you don’t need a higher absorbency to hold your flow, but any pair of Proof will give you peace of mind every day of the month. We recommend The Everyday Undie for every day of the week - smooth, seamless edges disappear beneath clothing, and a super slim lining absorbs discharge, sweat, and spotting to help keep you secure and confident.

Proof period underwear are one of the most safe period products available. Proof is an external use product, meaning it does not go in the body, like a tampon would. Internal use products like tampons carry the risk of Toxic Shock Syndrome, a rare but serious condition caused by bacterial toxins. Proof period panties remain outside of the body, which decreases the risk of harmful bacterial growth in the body.

What’s more, Proof is designed with high quality materials that have been rigorously tested to ensure your safety. Proof period undies are free of PFOA-PFOs, lead, phthalates, and other harmful chemicals. Our leakproof pairs feature antimicrobial fibers that not only fight odor, but inhibit the growth of bacteria to help keep you healthy and fresh.

Our leakproof technology is woven in - not sprayed on the top lining, like other period undies - so it will never wash out or reabsorb into the body. We are dedicated to providing you with the highest quality care - down there.

Please do! We designed Proof period underwear in a wide range of absorbencies to suit any flow, from spotting to super heavy periods. To find your absorbency level, gauge your flow based on typical tampon usage on an average day. Helpful tip: Remember, many women change tampons before they are entirely saturated - and our guide is based on tampons used to their saturation point.

Most Proof users find they can wear our period underwear for 12+ hours before changing. In other words, when you find the absorbency level that suits your flow, you can wear them as you would a normal pair of undies - one pair during the day, and one pair at night - without having to change.

If you’re unsure of your absorbency level, or worry that Proof can’t handle your flow (trust us - it can!), you may want to consider wearing Proof as a backup for your tampon or cup before switching completely. Consider it the ‘dating’ phase of period underwear. We’re pretty sure you’ll be going steady in no time at all.

Quick answer? A lot.

Proof underwear are a reusable alternative to single-use plastic disposables like pantyliners, pads, and tampons. Additionally, they are safer than tampons - as Proof undies are not an internal use product - and will not cause Toxic Shock Syndrome. We use only the highest quality materials when constructing our underwear - so you’re covered and comfortable, all day.

Ohhh yeah. Our lighter absorbency pairs are excellent for every day wear, when you don’t need a higher absorbency to hold your flow, but any pair of Proof will give you peace of mind every day of the month. We recommend The Everyday Undie for every day of the week - smooth, seamless edges disappear beneath clothing, and a super slim lining absorbs discharge, sweat, and spotting to help keep you secure and confident.

Proof period underwear are one of the most safe period products available. Proof is an external use product, meaning it does not go in the body, like a tampon would. Internal use products like tampons carry the risk of Toxic Shock Syndrome, a rare but serious condition caused by bacterial toxins. Proof period panties remain outside of the body, which decreases the risk of harmful bacterial growth in the body.

What’s more, Proof is designed with high quality materials that have been rigorously tested to ensure your safety. Proof period undies are free of PFOA-PFOs, lead, phthalates, and other harmful chemicals. Our leakproof pairs feature antimicrobial fibers that not only fight odor, but inhibit the growth of bacteria to help keep you healthy and fresh.

Our leakproof technology is woven in - not sprayed on the top lining, like other period undies - so it will never wash out or reabsorb into the body. We are dedicated to providing you with the highest quality care - down there.

Please do! We designed Proof period underwear in a wide range of absorbencies to suit any flow, from spotting to super heavy periods. To find your absorbency level, gauge your flow based on typical tampon usage on an average day. Helpful tip: Remember, many women change tampons before they are entirely saturated - and our guide is based on tampons used to their saturation point.

Most Proof users find they can wear our period underwear for 12+ hours before changing. In other words, when you find the absorbency level that suits your flow, you can wear them as you would a normal pair of undies - one pair during the day, and one pair at night - without having to change.

If you’re unsure of your absorbency level, or worry that Proof can’t handle your flow (trust us - it can!), you may want to consider wearing Proof as a backup for your tampon or cup before switching completely. Consider it the ‘dating’ phase of period underwear. We’re pretty sure you’ll be going steady in no time at all.