Perform with the power and comfort of ZQ-certified Merino wool in Smartwool's Hike Light Cushion Crew socksformerly known as PhD? Outdoor. Smartwool has updated their best women's hiking socks to include more sustainable materials with the addition of recycled nylon improved durability and mesh zones and an even more perfect fit. But don't worry. Smartwool's fan-favorite sock technologies aren't going anywhereoffering you all-day comfort and natural performance in a women's-specific fit. A crew height helps add coverage on the trails and light cushioning along the entire bottom of the foot helps keep you comfortable when the ground isn't. Take care of your feet with Smartwool's best-fitting best-feeling hiking socks.