I'm sure you've heard that gynecologists recommend wearing cotton underwear, but did you know why? Mainly, because cotton is air permeable and our intimate body parts must be able to breathe to stay in the best shape. Our lady bits clean themselves by secreting mucus, which needs to be absorbed, and cotton does the best job. This is where silver ions come to their aid, preventing bacteria from multiplying and unpleasant odor from spreading. Beside that EiVi Period Panties feature patented double gusset to hide pad wings, so you can feel discreet during your period.