High performance sock that is made for outdoor enthusiast. Made of soft merino wool yarn. Merino wool is treated so that the sock will hold its size and shape after repeated washings. It has an ankle band to prevent sock crawl, and adds a reinforced heel and toe for extra long wear. Content: 60% merino wool, 20% acrylic, 17% nylon, 3% Lycra. Weight: Midweight.