The Smartwool Run Zero Cushion Low Ankle Sock - Women's is a minimalist sock for running. The zero cushion allows for low bulk, with a close foot-to-shoe feel. The 4 Degree elite fit system keeps it in place without bunching, and a Virtually Seamless toe and an Achilles tab increase comfort. Constructed using mesh zones for breathability, and a merino wool blend that wicks sweat and regulates temperature.