Women's Nike Training Tank LOOSE FIT FOR EASY LAYERING. Women's Nike Training Tank is made for movement. With its relaxed silhouette, dropped armholes and exaggerated racerback, it feels light and airy so you can work hard without restrictions. Dri-FIT technology helps keep you dry and comfortable. Racerback design allows for a full range of motion. Mesh panel runs vertically down the back for increased ventilation.