Nike Pro Leak Protection: Period. Girls' Dri-FIT Leggings. Life doesn't have timeouts. But that doesn't mean you should have to stop practicing or having fun when you're on your period. We made your favourite Nike Pro leggings even better by adding an ultrathin liner that helps prevent period leaks so you can do what you want, stress-free! Stay Active: Your period doesn't care if it's game time—but that shouldn't prevent you from staying active. The ultrathin absorbent liner, when worn with a tampon, pad or cup, helps prevent leaks so you can focus on having fun. The sleek, dual-layer design sits in a smooth, stretchy brief designed to move with you.