For women who love trail running, the Smartwool Women's PhD Outdoor Light Crew Socks are a great choice for the Christmas season. These socks are made from a blend of merino wool, nylon, and elastane, providing excellent moisture management and temperature regulation. The 4 Degree Elite Fit System ensures a secure and comfortable fit, preventing the socks from slipping or bunching up. The light cushioning offers impact protection and support, making these socks ideal for long-distance runs. With a virtually seamless toe, these socks eliminate the risk of blisters and irritation. Whether you're running on snowy trails or muddy paths, the Smartwool Women's PhD Outdoor Light Crew Socks will keep your feet warm, dry, and comfortable this Christmas.