Nordic Light Trekking definitely belongs to the second

definitely belongs to the second category

continuously regulated power

Compression class: 1Compression level: light

Thanks to integrated ventilation channels on the leg and moisture-regulating fabric

5 hours with a 3A USB charger

Nordic Light Trekking definitely belongs to the secondThe incorporation of Profilen makes the sock more resistant and prevents the formation of blisters. This fiber also acts as an optimal insulator to regulate moisture so that your feet stay dry. The padding protects the shin, while the elastic zone around the instep provides support. This sock is made from extremely durable fibers, so even the toughest boots and skates won't harm it.