X-BIONIC Twyce Race: double the cooling, double the performance. The innovative Twyce technology supports your body with Y-shaped elements for natural temperature and moisture management. In combination with the 3D Bionic Sphere System and ThermoSyphon structure, the material directs moisture away from the skin and transports it to areas where it can evaporate quickly. The X-BIONIC TWYCE RACE VEST perfectly complements our Twyce Race shirts and shorts: together they optimally regulate your body temperature - even during the most strenuous runs.