Allen Edmonds Men's Merino Wool Blend Over-The-Calf Socks, Navy, X-Large/Standard 57% Stretch Nylon, 42% Merino Wool, 1% Spandex Made in US Machine Wash Breathable mesh air vent keeps toes dry with virtually seamless toe design that eliminates irritation Includes smart silver anti-microbial treatment that protects fabric from odor and bacteria