Are you a running enthusiast? Now you can reach a new high in your running performance! Because the X-BIONIC EFFEKTOR RUN SHIRT SH SL MEN maximizes your running performance with all the innovations of the new X-BIONIC 4.0 generation. Newly integrated: ThermoSyphon system, the next generation of the legendary patented 3D Bionic Sphere system. Its complex 3D structure on the back and chest has internal and external air channels whose thermodynamics improve your skin climate. ThermoSyphon cools when you sweat and warms you when you're cold. Closely spaced channels capture perspiration and transport it to evaporation-intensive regions. This maximizes cooling and increases your performance. Your additional performance booster: X-BIONIC Partialkompression exerts pressure on your muscles via narrow bars, thereby reducing muscle vibration, improving the supply of oxygen and nutrients to the muscles and enabling faster regeneration – all without neglecting skin cooling. This X-BIONIC 4.0-generation product is manufactured using ultra-high-resolution Retina technology. You can feel the difference in its high effective density, intensive functional transfer and precisely defined functional zones.