These Fox River socks are extra-heavy weight and made from wool. Wool naturally reduces odor and is great at regulating temperature. The stretch ribbing won't sag and the fully cushioned foot provides extra insulation against the cold. Fox River socks are guaranteed against manufacturing defects for 1 year and are proudly made in America. Specs: 84% wool, 9% acrylic, 6% nylon, 1% spandex