Innovative Speed The Aeroswift Collection is Nike's pinnacle racing gear. Our apparel is made for speed using the latest technology, delivering optimal performance and distraction-free coverage. Streamlined designs are lightweight and sleek, helping you move freely as you finish strong. Breathable, Streamlined, Fast Nike Dri-FIT ADV technology combines moisture-wicking fabric with advanced engineering and features to help you stay dry and comfortable. It combines with stretch-woven fabric and innovative yarns, helping you stay cool while moving freely through your stride. Ventilation on the Fly The Flyvent waistband provides lightweight ventilation for exceptional comfort. It has "Nike AeroSwift" branded drawcords to help you adjust the fit. Storage For the Run A center-back pocket with reflective details keeps your phone secure. 4 additional pockets around the waist helps stash a key or card. Worried about your items getting wet? 2 of those side pockets have a moisture barrier to keep your gear dry. More Benefits Brief liner offers support where you need it. No seam at the front helps reduce chafing. Product Details Tight fit for a body-hugging feel Body: 89% polyester/11% spandex. Brief: 89% polyester/11% spandex. Machine wash