The Rocky Wool Blend Hiker Socks for Shoe Size 6-9, 2-Pack, are ideal for hiking and backpacking. They are made of a soft wool blend with stretch fibers and feature a ravel-free, welt-top construction for a comfortable snug fit. Every pair of Rocky wool socks are warm and comfortable, so that you can concentrate on your hike, not your feet. They also have ScentIQ technology that helps to prevent foot odor. In addition, they are machine washable for your convenience.