Fox River Mills, Inc., is a sock manufacturer based in Osage, Iowa. The company was founded in 1900. In 1992, they purchased the Nelson Knitting Company of Rockford, Illinois, and in the process acquired the trademark on the Red Heel socks used to make sock monkeys. Fox River Mills includes instructions for making a sock monkey in every packet of Red Heel socks. Fox River Mills is also known for their odor-controlling X-Static sock liners and their line of organic wool socks. See also List of sock manufacturers References External links Home Page Beer Socks Clothing companies of the United States Companies based in Iowa Clothing companies established in 1900 Hosiery brands Socks 1900 establishments in Iowa Osage, Iowa