Wigwam Rebel Fusn No Show II Hiking Socks Outer: 68% Stretch Nylon, 30% Merino Wool, 2% Spandex Liner: 100% Olefin Made in US Seamless toe closure for better fit Heel tab prevents slippage and ensures secure fit Foot hugging fit and comfort allows you to keep on trekking Breathable mesh instep for ventilation