UA RUSH is an infrared technology that reflects your body's energy and helps you work harder and regenerate better. Soft knit fabric with engineered mesh for ventilation that adapts to where you need it most. Near-seamless construction eliminates chafing. The 4-Way Stretch technology allows for better movement in every direction. The material wicks away sweat and dries very quickly. High waist for optimal coverage and support. Odor control technology minimizes odors. Leg length from the crotch: 17.78 cm.