The Smartwool PhD Outdoor Light Crew Socks are a popular choice among women mountain bikers for their superior comfort and performance. These socks are made from a blend of merino wool, nylon, and elastane, providing excellent moisture-wicking, odor resistance, and temperature regulation. The light cushioning offers impact protection without adding bulk, making them suitable for various terrains. The 4 Degree Elite Fit System ensures a secure and comfortable fit, while the flat-knit toe seam prevents blisters. With their durability and versatility, the Smartwool PhD Outdoor Light Crew Socks are a reliable choice for any mountain biking enthusiast.