The X-BIONIC COREFUSION RUN SHIRT SH SL is more than just a running shirt - it is your personal thermoregulator. Thanks to the revolutionary CoreClimate Zone, your body temperature remains at the optimal performance level of 37°C, regardless of the intensity of your run or external conditions. This allows you to fully concentrate your energy on your performance. The HygroDiffuser technology with VectorSphere ensures a perfect balance between warmth and coolness. The 3D-knitted channels and air pockets keep you warm when you first start running or take a breather. As soon as you start to sweat, the moisture is distributed and redirected over a large surface area, creating a cooling effect. This way, you always feel fresh and full of energy.