The Smartwool PhD Run Ultra Light Micro Socks are a top choice for women who are passionate about ultrarunning. These socks are made with a blend of merino wool and synthetic fibers, providing excellent moisture management and temperature regulation. The ultra-light cushioning offers maximum impact protection without adding bulk. The 4 Degree Elite Fit System ensures a secure and comfortable fit, while the Virtually Seamless toe construction prevents blisters and irritation. These socks also feature a women's-specific fit for enhanced performance. Whether you're hitting the trails or pounding the pavement, these socks will keep your feet happy and blister-free.