X-Bionic Energy Accumulator 4.0

Conquer the summits of ambitious performance sport with the X-Bionic Energy Accumulator 4.0 Shirt Turtle Neck Long Sleeve Men. The 4.0 generation is the first to offer Retina ultra-high-definition quality for unrivalled functional precision. The legendary patented 3D Bionic Sphere System with ThermoSyphon technology is more powerful than ever and works on the chest and back: complex 3D structures and Y-shaped elements maximise air exchange, cooling when you sweat and warming when you're cold. Functional zones such as the Air-Conditioning Channel and the AirComPlex zone in the upper abdomen as well as ISO shoulder and sweat traps under the arm are also part of the performance-enhancing thermoregulating technologies. Expansion ribs on the elbows ensure optimum climate comfort and at the same time offer full freedom of movement.