Perfect fit. Powerful durability. That's what you get when you put on our responsibly sourced Merino wool women's Smartwool Hike Light socks. Formerly known as PhD® Outdoor, these socks feature our top sock innovations and women's-specific fit, updated mesh zones, and increased durability, we've 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.