Hot days are no longer a problem on your hikes: The Trekking One Cool socks are the lightweight version of the revolutionary Trekking One. They combine the comfort and advanced functionality of the innovative Zerocuff technology with the breathability and lightness of the bio-based Natex yarn. The absence of a cuff allows for better blood circulation, so your feet won't feel swollen or tired even after hours of walking. The Cool Air Flow technology ensures improved airflow around the foot. The 3D protective structures placed at critical points on the foot and ankle provide all-around protection: the result? The indispensable sock for your adventures.