Lightweight, innovative, bio-tech sock from UYN that is particularly suitable for sporting activities and trekking - made from new NATEX fiber! Double the activity and double the comfort with the 2IN DEFENDER socks. Thanks to the unique Two Layers construction, these socks have a double layer of fabric that reduces the factors that cause blisters. Three-dimensional micro-channels promote air circulation and ensure that feet stay cool and dry for longer. This effect is further enhanced by the exclusive bio-based Natex yarn, which immediately wicks away sweat and odor. Strategic protective features maximize comfort in the shoe. Featuring exclusive ZEROCUFF technology to help keep your legs from tiring even after many hours. Double Layer - Two-layer sock system that prevents friction that can lead to blisters Natex is 25% lighter and dries up to 50% faster than comparable fibers. This 100% organic material is also extremely elastic and its anti-bacterial properties minimize odours