Nike AeroSwift technology integrates innovative features and materials with a precision fit to deliver mobility and lightweight comfort, helping to keep you at your fastest from start to finish. Advanced Sweat-Wicking Nike Dri-FIT ADV technology combines moisture-wicking fabric with advanced engineering and features to help you stay dry and comfortable. Breathable Design A Flyvent waistband provides lightweight ventilation for exceptional comfort. A lightweight brief provides extra support and ventilation. More Benefits Designed for Racing Length: 4" Liner: Brief Fabric: Woven Storage: Internal key pocket Waistband: Flyvent with drawcord Product Details Standard fit for a relaxed, easy feel Pleated back Double Swoosh design at the sides Split hem Body: 100% recycled polyester. Waistband: 73% nylon/27% spandex. Lining: 89% recycled polyester/11% spandex. Machine wash Imported Shown: Black/White