Hi-Waist Period Underwear for Women: Thinx Comfort Stretch Undies are menstrual underwear for women that combine Thinx's stylish silhouettes with lace and mesh details in a silky-smooth fabric, helping ensure both comfort and protection during your period All-Day Absorbency: Our womens period underwear holds up to 12 regular tampons' worth of flow. The super absorbent core layer can handle up to 3 regular pads' flow and helps provide reliable protection throughout the day Leakproof for up to 12 Hours: Thinx period underwear for women, featuring the LeakSafe barrier, helps provide reliable leak protection all day. These period panties are a complete replacement for disposable period products or as a backup to tampons or menstrual cups