The Nike Pro Leak Protection: Period Dri-FIT Leggings are imported. Move with confidence no matter what time of the month it is when you wear the Girls' Big Kids' Nike Pro Leak Protection: Period Dri-FIT Leggings. These leggings come with an ultra-thin brief liner that helps prevent period leaks when used in conjunction with a tampon, pad or cup, which means you can stay active even when you're on your period.