Thermal sock ideal for trekking, skiing or daily use on cold, low-temperature days. Made with Merino Richter® Wool and Fiber Heat® fiber, which is an intelligent fiber created from the mixture of different thermal yarns, resulting in a yarn capable of self-heating, since it not only maintains, but also generates heat to ensure the perfect temperature of the feet. In turn, the Lhotse sock has an antibacterial wash made with Adratex EXT-TFN.