Womens Merino Wool Tab Sock With Arch Support Made by CSI in The USA 75 % Merino 10% Nylon 15% Spandex Moisture-Wicking Made In The USA Merino takes the itch out of wool. Merino wool fiber is so fine that five strands equal the width of a human hair. Its long silky fibers guarantee a wool sock that wont itch. Wool merino wool socks retain their soft feel, wash after wash. Uses: Hiking,Running,Walking, and Causal Wear