Conquer extreme cold with confidence. The X-BIONIC® RADIACTOR 4.0 PANTS MEN enhance winter sports performance by reflecting body heat using XITANIT® 2.0, improving sweat management with the 3D Bionic Sphere® System and ThermoSyphon®, and providing flexible insulation thanks to Expansion Ribs®. Stay warm, dry, and unrestricted for longer, stronger sessions in harsh climates.