UA RUSH is an infrared technology that reflects your body's energy and helps you work harder and recover better. Soft knit fabric with designed mesh for ventilation that adapts to where you need it most. The near-seamless construction eliminates chafing. 4-Way Stretch technology allows for better movement in every direction. The material wicks away sweat and dries very quickly. Odor control technology minimizes odor. Material: 59% Nylon, 35% Polyester, 6% Elastane