X-Bionic Invent 4.0 Run Speed is an innovative men's running shirt designed for demanding training and competitions. The Invent 4.0 clothing line is designed for people who want light compression and effective thermoregulation at the same time, in order to achieve the highest comfort during sports. They have an advanced 3D Bionic Sphere® system, which is designed to cool the body when we feel hot and sweat, and warm when we are cold. During physical activity, the natural function of sweating cools the body, keeping it at an optimal temperature of 37°C. Precisely placed Sweat Traps® absorb excess sweat, allowing it to evaporate efficiently. The ergonomically designed IDEO-WAISTBAND system is characterized by an elongated cut at the back, which prevents clothing from shifting during movement. All X-Bionic products are made in an extremely modern factory in Italy and are manufactured according to the strictest European standards, ensuring the highest quality and durability of use. Collapse description.Product featuresexcellent thermoregulation, maintaining a constant temperature of 37˚Cstretchable technical material, very comfortable to wearlight compression, good fiteffective sweat wickinghigh quality material