Feel Supernatural with the X-BIONIC® ENERGY ACCUMULATOR TURTLE NECK LS SwissSki. enhances your winter sports performance by mastering sweat management with natural thermodynamics. As proven by Marco Odermatt and the Swiss Ski team in the heat of competition – in sub-zero temperatures. Warms when you're waiting to go and cools when you're pushing at the limit. Featuring the patented ThermoSyphon® and 3D Bionic Sphere® systems, it channels warm air and insulates the solar plexus. The AirComPlex-Zone shields sensitive areas while Expansion Ribs® maintain flexible insulation without restricting motion. Chase the win.