At Ridgemont we're constantly striving to improve our products and the experience our customers have when wearing them. This endeavor has led us to create our revolutionary new"supplemental shoe liner". They're designed to be worn directly on the feet, forming an additional comfort layer between the skin and the lining of your Ridgemont boot. In addition to providing extra comfort and cushioning, these supplemental liners are non-slip to prevent blisters, anti-microbial and moisture wicking. Additionally, because of our unique 3-D modeling process, these supplemental liners will fit most adults with human style feet, and will work not only Ridgemont boots, but most other manufacturers as well.. Finally, you get that these are socks..? They're real good socks made from a great blend of Cotton, Merino Wool, Spandex, Acrylic, Polyester & Nylon for daily use. Enjoy!