Color: Gray/Navy Size: Unisex - Medium (US M 7-9 / US W 8.5-10.5) From Balega: Silver No Show running socks by Balega are uniquely made to offer the ultimate compression for performance. Composed of silver ions, which are encapsulated in the Drynamix yarn, the Silver No Show running socks promote an antibacterial, hygienic environment to keep feet clean, dry, and free of odors, mold, and fungi. Questions? Leave a comment below!