A Backpacker Magazine Editors' Choice Award winning product, and for good reason. There are a whole lot of features, packed into the Fox River X Static Liner Socks. Silver fiber construction regulates temperature and is anti microbial to inhibit odor and bacteria. Ultra lightweight and smooth, to fit nicely under your outer hiking socks. Backpacker Magazine Editors' Choice Award winning product. Contains all natural silver coated nylon fiber to provide odor protection, comfort and anti microbial properties. Silver X static fiber eliminates odor and inhibits growth of bacteria and fungi. X static transfers heat and regulates foot temperature, keeping feet cooler in summer and warmer in winter. No bulk smooth jersey knit design. Ultra lightweight. 60% polypropylene, 20% nylon, 19% X Static nylon, 1% spandex. Made in USA.