Machine Wash,90% cotton, 10% spandex Panty Is The Upgrade Of The Super Breathable And Comfortable Material With Small Breathable Holes That Will Keep You Comfy And Cool All Day Long. Period Panties With Built-In Absorbing Layer Up To 2 Tampons' Worth Capacity Allows You Wear Directly For Light Days, Spotting, Postpartum Bleeding And Stress Leaks. Use Period Panties As Additional Back-Up During Regular And Heavy Days. NO LEAK DURING MENSTRUAL PERIOD: The underwear serves as extra protection from leaks. MUST use together with sanitary napkins, tampons, pantyliners, menstrual cups, maternity pads or incontinence pads. The underwear protects user if there is an overflow from the pad. FEEL FREE & CONFIDENT: Providing Extra Protection Against Unexpected Overflow From Tampon Or Menstrual Cup During Heavy Days, No More Worry About Staining Pants Or Bedsheets.