Fox River Basecamp Quarter Crew Hiking Socks - Unisex The Fox River Basecamp Ankle Hiking Socks feature Fox Rivers own Wick Dry moisture management technology and are made from soft Merino wool. The URfit System provides long-lasting support for adventure and all day wear. Great fit and support means youre cushioned, dry and comfy no matter where you end up.Contents: 42% nylon, 28% Merino wool, 28% acrylic, 2% spandex.