The Smartwool PhD Outdoor Light Micro Socks are a top choice for women's trail running socks on Amazon. These socks are made with a blend of merino wool, nylon, and elastane, offering a perfect balance of comfort, durability, and moisture management. The light cushioning provides impact protection without sacrificing a minimalist feel. The 4 Degree Elite Fit System ensures a secure fit, and the Virtually Seamless toe construction prevents blisters. These socks are highly recommended for all-season trail running.