More power without performance slumps caused by overheating? Get more with the X-BIONIC® THE TRICK® 4.0 RUN SHIRT SH SL WOMEN. This high-tech running shirt for women is part of the new X-BIONIC 4.0 generation. Its patented and unique THE TRICK® technology optimizes your energy management while you run. It revolutionizes your thermoregulation by activating production of perspiration before you overheat so you remain continually active at optimal body temperature when you train or compete. The energy released by the earlier onset of evaporative cooling flows directly into your running performance. This mechanism acts like an energy booster for your performance to awaken the best runner inside you. Your run will be comfortable thanks to the innovative collar construction, which ensures a perfect fit. The integrated Flexor arm cuffs prevent the sleeves from slipping. Even during your first running workout, you’ll already feel the technological edge of ThermoSyphon® system the next generation of the legendary patented 3D Bionic Sphere® system. It optimizes your skin-climate management through large exchange zones on chest and back. This shirt is a precision instrument for maximal performance because it’s manufactured with extreme precision by state-of-the-art machines in Retina® ultra-high-definition technology and is accordingly much more effective than the previous generation of X-BIONIC® products.