Power your winter sports confidently. The X-BIONIC® ENERGY ACCUMULATOR 4.0 PANTS 3/4 employ the patented 3D Bionic Sphere® System with ThermoSyphon® to enhance natural thermodynamics and sweat management. Integrated Intercooler® technology collects and evaporates sweat precisely where muscles need it, while Expansion Ribs® provide flexible insulation that moves seamlessly with your body. Stay warm, dry, and agile through every winter challenge, pushing your performance farther and stronger.