Dri-FIT ADV technology combines moisture-wicking fabric with advanced engineering and features to help you stay dry and comfortable. The Flyvent waistband provides lightweight ventilation for exceptional comfort. A center-back pocket with reflective details keeps your phone secure. 2 of those side pockets have a moisture barrier to keep your gear dry. Brief liner offers support where you need it. No seam at the front helps reduce chafing. Tight fit for a body-hugging Your hard work has gotten you to the starting line. Let the Nike Dri-FIT ADV AeroSwift Tights take you to the finish. Buttery smooth, with a lightweight, secure feel, these tights are geared to help you reach your personal best. This product is made with at least 75% recycled polyester fibers.