The Smartwool Women's PhD Outdoor Light Pattern Mini Sock is a women's specific sock for all day wear. Featuring the 4 Degree; Elite Fit System, the flex zone at the ankle joint and Performance Fit allows you to focus on the activity, instead of what your sock is doing. The light cushion is ideal for trail or road, hikes and runs. Features of the Smartwool Women's PhD Outdoor Light Pattern Mini Sock Indestructawool Technology for enhanced durability 4 Degree elite Fit system for a dialed, Performance-oriented Fit Body mapped mesh zones for added breathability Virtually Seamless toe for enhanced comfort Narrower heel and Slimmer Fit Fabric Details 57% Merino Wool, 41% Nylon, 2% Elastane