HIGH-TECH FOR LOW TEMPERATURES. Warm feet even in bone-chilling cold. That's what the X-SOCKS® Winter Run with highly insulating Merino wool makes possible. Through the integration of 99.9 % pure silver in the footbed, the X-SOCKS® Winter Run also inhibits the growth of germs and bacteria. The patented terry loop construction guarantees the largest possible surface of silver so foot odour never has a chance. But wait, there's more: The fibre doesn't absorb even the tiniest bit of moisture. The loops function as a buffer to direct moisture immediately to the surface of the sock. The result is dry and climate-controlled feet that also don't get cold as quickly. The X-SOCKS® Winter Run socks keep you pleasantly warm, but they also protect a distance runner's foot from blisters and chafing because dry skin is more resistant to friction pressure.