The Smartwool PhD Run Ultra Light Micro Socks are a popular choice among women ultrarunners. These socks are made from a blend of merino wool, nylon, and elastane, providing excellent moisture management and temperature regulation. The ultra-light cushioning offers minimal bulk and maximum performance. The micro height ensures a snug fit and prevents the socks from slipping down. These socks feature Smartwool's Indestructawool technology, making them highly durable and long-lasting. With their seamless toe construction, they eliminate the risk of blisters and irritation. Whether you're running on rugged trails or smooth pavement, these socks will keep your feet comfortable and protected.