The Merino Wool in these sock makes for an excellent backpacking sock fiber. Merino wool is much softer than regular wool, but it has all of the same great benefits. This rich merino wool and stretch nylon fabric is extremely comfortable. It wicks moisture naturally so that your feet stay nice and dry on the trail. The worst thing for your feet is to hike with wet socks inside your leather hiking boots. It is also a very durable fabric so they last much longer than regular athletic socks. These socks will feel great on your feet. The stretch nylon hugs your foot for a perfect fit.