The Smartwool PhD Outdoor Light Crew Socks are a top choice for women who need reliable trail running socks. These socks are made with a blend of merino wool and synthetic fibers, providing excellent moisture management and temperature regulation. The light cushioning offers added comfort and support without sacrificing breathability. The crew length provides extra coverage and protection for your ankles on rugged trails. These socks also feature a 4 Degree Elite Fit System, which ensures a secure and comfortable fit. With their durability and performance, the Smartwool PhD Outdoor Light Crew Socks are a great investment for any trail running enthusiast.