The Nike Dri-Fit Miler Womens Running Vest is designed with a sweat wicking Dri-FIT technology to help keep you dry as you run so that nothing will slow you down. Mesh at the back provides targeted breathability. Dropped back hem keeps you covered. Racerback design allows for freedom of movement. Front hem is designed to hit at your hips. Standard fit follows the shape of your body with room for layering.