The Smartwool Men's Performance Hike Light Cushion Pattern Ankle Sock is a ankle height sock for low height hiking shoes. Dip toes first into Indestructawool technology for longer durability. The Made in the USA socks are constructed from an imported yarn blend of merino wool, nylon, recycled nylon and elastane for temperature regulating comfort all hike long. Equipped with the 4 Degree Elite Fit System, it stays in place and flexes at the ankle for unrestricted comfort inside the shoe.