Nike Dri-FIT technology moves sweat away from your skin for quicker evaporation, helping you stay dry and comfortable. Mesh over high-heat areas at the back, sides and underarms lets air flow to help keep you cool when the action heats up. Lightweight, stretchy fabric with vents at the hem helps you move naturally during high-intensity sets. Flat seams feel smooth and make it comfortable layered under other tops. 92% polyester / 8% spandex