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 Comfy & Flexible: Made with comfortable and flexible fabric, Thinx period underwear feels like regular underwear while offering built-in leak protection. Additionally, they are FSA / HSA eligible and are made without PFAS We're Thinx, better known as our family of brands, Thinx, Thinx Teens, and Thinx for All Leaks. Our vision is a healthy world through sustainable solutions to menstruation and incontinence. Since 2013, we've been on a mission to be an innovative leader at creating comfortable and inclusive products for all life's leaks, while sparking conversation and building community along the way It’s time to leakproof your period for up to 12 hours with Thinx period underwear that looks and feels just like regular underwear but is designed with built-in period protection that helps keep you fresh and dry. Thinx period underwear features an absorbent core layer that absorbs up to 12 regular tampons’ worth of flow. Thinx period panties are washable and reusable. Machine wash your Thinx period underwear on cold with like colors, line dry, and repeat! Wash before wear. Not for use on open cuts, abrasions, or incisions. Replace at 30 washes.