bamboo viscose fiber brief menstrual leakproof panties us size l/7 black-5 packs yoyi fashion stretchy menstual period panty comes with soft and highly breathable fabric. no more embarrassing stains on clothing or mess of cleaning the mattress. make you feel comfortable and protected!the outside of this protective underwear is made of high quality bamboo fiber and spandex, with features of breathable, hypoallergenic, moisture-wicking, stretchy, soft and silky. the inner lining is a high bamboo fiber and polyester which provides leakage protection in the center and rear of the underwear.with the worryfree period panty you can now be assured of worry-free nights and days, at work, meeting, school and social outings. it is your best friend during your discomforting menstrual period!