Perfect fit. Powerful durability. Thats what you get when you put on Smartwools responsibly sourced Merino wool womens Hike Light socks. Formerly known as PhD Outdoor, these socks feature Smartwools top sock innovations and womens-specific fit, updated mesh zones, and increased durability, theyve upgraded these hike socks to help you push any summit or enjoy any trail in absolute comfort. Light cushioning along the entire bottom of the foot offers a snug fit in your favorite low-cut hiking shoes. And the addition of recycled nylon makes for a more sustainable sock construction.