Ideal for layering over a sports bra the Women's Nike Breathe Elastika GRX Tank Top is made with Dri-FIT technology that wicks perspiration away from the skin to keep you comfortably dry. It has a loose fit with a narrow racer style back for increased freedom of movement, while the back hem is lower for enhanced coverage. Designed for high endurance workouts & training Ideal for layering over a sports bra Dri-FIT technology wicks perspiration away from the skin to keep you comfortably dry Loose fit with a narrow racer style back for increased freedom of movement Back hem is lower for enhanced coverage Material composition: 100% Polyester