Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
how it works
holds up to 5 tampons
Our Moderate Mesh Trim Brief holds up to 5 regular tampons’ worth of flow to help keep you feeling comfy, cute, and protected all day.
SHOP MODERATE
holds up to 7 tampons
Our Super Heavy Brief holds up to 7 regular tampons’ worth of flow and will be a top drawer essential for your heavy period days.
SHOP SUPER HEAVY
holds up to 9 tampons
Our Overnight High Rise Brief holds up to 9 regular tampons’ worth of flow so you can get the worry-free sleep you've been dreaming about! These undies offer maximum absorbency with a super slim lining.
SHOP OVERNIGHTwith proof. you’re ready, always
Our Proof by Always collection is made with our patented Leak-Loc® layers that, combined with bonded, reinforced edges, help protect you from leaks. These styles are built to hold a lot of flow while helping you feel dry all day or night. Each pair was crafted to give you confidence no matter how you flow throughout your period week.
who we are
Founded by three sisters in 2020, Proof was built with a mission to provide women with meticulously designed, expertly constructed period underwear. They decided it was time for a different kind of period experience—one where women can feel their most confident during “that time of the month”.
Fast forward to present day, Proof and the forces at Always decided to come together to bring you even better protection with higher absorbency and superior technology. Proof by Always is the period solution that has your back...period.
