The Nike Dri-FIT tank top One is our most versatile top, designed to take you from the gym to yoga to running. The soft, flowing fabric (made from 100% recycled polyester fibers) allows air to circulate to keep you dry and cool. This breathable design with Nike Dri-FIT technology wicks away perspiration for greater evaporation rapide, keeping you dry and cool. Soft, smooth fabric is rounded at the back hem for added protection. Small side slits allow for greater freedom of movement. Neither too tight nor too loose, this style emphasizes your natural silhouette without restricting your movements. The "Just Do It." print on the inside of the hem offers an inspiring message just for you.