The Smartwool Women's PhD Outdoor Light Crew Socks are designed for trail running enthusiasts. These socks are made with a blend of merino wool, nylon, and elastane, providing excellent moisture management and temperature regulation. The light cushioning offers targeted impact absorption, while the mesh ventilation zones enhance breathability. The 4 Degree Elite Fit System ensures a secure and comfortable fit, preventing the socks from slipping or bunching up. These socks also feature a flat-knit toe seam for added comfort and durability. Whether you're tackling steep inclines or navigating rocky terrains, these socks will keep your feet comfortable and protected.