Allen Edmonds Men's Merino Wool Blend Mid Calf Socks, Charcoal, Sock Size:10-13/Shoe Size: 6-12 50% Nylon, 49% 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