With the performance, power and comfort of responsibly sourced Merino wool the SmartWool Women’s Performance Hike Light Cushion Ankle socks provide a lightweight technical option for your feet. Formerly known as PhD Outdoor, they've been updated to include more sustainable materials with the addition of recycled nylon, improved durability, updated mesh zones, and an even more perfect fit. The lower ankle makes these Smartwool Socks ideal for wearing with lightweight running shoes. Smartwool Women’s Performance Hike Light Cushion Ankle Features: 58% Merino Wool, 28% Recycled Polyamide, 12% Polyamide, 2% Elastane Mesh Ventilation Zones Optimum Moisture Management Maximum Breathability Light Cushion Seamless Construction Indestructawool™ Technology Features Exceptional Durability and Comfort Comfort Welt with 'Stay Put' Fit