The 3D Bionic Sphere System with ThermoSyphon technology maintains the perfect body temperature of 37°C in every situation to ensure optimal performance at all times. Only with X-BIONIC 4.0: Innovative Retina Ultra-High Resolution, award-winning, patented 3D Bionic Sphere System with ThermoSyphon technology. With complex 3D structures of inner and outer air channels. It cools when you sweat and warms when you are cold. Award-winning, patented 3D Bionic Sphere System with ThermoSyphon technology. With complex 3D structures of inner and outer air channels. It cools when you sweat and warms when you are cold. Sorestopper texture. The special texture on the inside of the material ensures highly efficient heat distribution. 100% pure Swiss development. Made in Italy. 700+ international awards and test victories, 800+ patent applications for products with the "X".