Kilpi LIRIN-U Ankle Socks are an ideal choice for hiking and outdoor activities. The merino wool blend shirt with silver ions has a slight antibacterial effect and is suitable for summer, spring or autumn. The ribbed top hem doesn't pinch or cut. A thinner perforated mesh is used on the instep to aid ventilation. Elastic ribs around the instep keep the sock on the foot and prevent it from rolling up. The unisex socks are available in three colors for both men and women.