Conquer the peaks of ambitious competitive sport with the X-BIONIC® SYMBIO MERINO PANTS 3/4 MEN. For a targeted effect, intelligent functional zones can be positioned even more precisely in the ultra dense knitted fabric. The high-tech underwear for enthusiastic winter sports athletes integrates a variety of thermoregulatory and protective features. The legendary patented 3D Bionic Sphere® System with ThermoSyphon® technology is more powerful than ever: Complex 3D structures and Y-shaped elements maximize air exchange, cool when you sweat, and warm when you are cold - now faster and more efficient than ever. Functional zones such as the Innerlap AirConditioning Zone® on the inside of the thighs and the ISO-CalfPad in the calf area regulate the temperature and increase performance. The ExpansionKnee at the knee joint ensures optimum climate comfort and at the same time offers full freedom of movement.