THE TRICK 4.0 Run Shirt activates the body’s thermoregulation earlier than previous ones and thus increases the performance in two ways. It prevents physical overheating and acts like a turbo for the other technologies that support the sweat management of the shirt. This holds especially true for the new 3D knit ThermoSyphon, which regulates the ­temperature on the outside and the sweat on the inside. A complex system of tunnels and channels with increased thread count per mm increases the evaporation area and improves stability even during movement.