These leggings are designed to support a distraction-free workout session. The NB Sleek Legging is designed to provide a distraction free running experience. Lightweight four-way stretch fabric moves with you, and a two-ply drawcord keeps the high waistband in place. That means not having to constantly adjust them as you run. Moisture-wicking fabric ensures that you aren't bogged down with sweat, even during your most intense efforts. There are a lot of things to focus on during a run. What you're wearing shouldn't be one of them.