The Smartwool PhD Outdoor Light Micro Socks are designed specifically for outdoor activities like trail running. These socks are made with a blend of merino wool and synthetic fibers, offering a perfect balance of comfort, moisture-wicking, and durability. The light cushioning provides impact protection without sacrificing a minimalist feel. The 4 Degree Elite Fit System ensures a secure and snug fit, preventing the socks from slipping or bunching up. These socks are a reliable choice for women who want performance and comfort on the trails.