Farm to Feet Kodiak Heavyweight Expedition Socks 70% Merino Wool 29% Nylon 1% Spandex Made in US Merino wool is soft, itch-free, naturally odor and bacteria resistant, cool in the summer and warm in winter Reinforcing yarns woven into the stretch shell increase durability, while wool fibers sit closer to the skin for maximum insulation - outer? Top-to-toe cushioning along the instep and shaft increases comfort, protects and insulates the foot from stiff boot tongues and uppers of heavy boots Full-density cushioning provides better insulation, wicking, impact protection and faster moisture absorption to keep you dry and reduce friction Reinforced construction and low-stress seam placement reduce wear and tear, increasing the life of the sock