Unstoppable performance made lighter. The X-BIONIC® ENERGY ACCUMULATOR LIGHT SHIRT LS 1/2 ZIP WMN boosts endurance in high-intensity winter sports. Featuring the 3D Bionic Sphere® System with ThermoSyphon® for adaptive temperature control, Neural-Response-Bandage for muscle readiness, and flexible Expansion Ribs® insulation, it keeps you cool, warm, and comfortable. Stay focused and move freer in every ski tour and cross-country mission this season.