X-Bionic Invent 4.0 LT is a men's running shirt with thermoregulatory properties. It is perfect for the summer season, when outside temperatures are higher, thanks to advanced technologies in the shirt, including 3D Bionic Sphere®, it prevents overheating and ensures thermal comfort during intense activity. In moments of lower activity, it insulates the body from the cold by retaining warm air. The priority of the X-Bionic brand is to maintain body temperature at 37˚C, which is the most optimal for physical effort. In order for the human body to maintain such a temperature, it devotes up to 97% of energy to this purpose. With the help of the latest solutions, this energy can be spent on increasing the effectiveness of training. The refined Ideo-Waistband, with a longer back, keeps the shirt in place, even during intensive training. The T-shirt is made of bacteriostatic materials, which prevents the growth of bacteria and limits the formation of unpleasant odors. All X-Bionic products are made in a very modern factory in Italy and are manufactured according to the strictest European standards, ensuring the highest quality and durability of use. Collapse description. Product features excellent thermoregulation, maintaining a constant temperature of 37˚C stretchable technical material, high wearing comfort light compression, good fit effective sweat wicking high quality material