Darn Tough Vermont Women's Merino Wool No-Show Cushion Hiking Socks Merino Wool 67% / Nylon 29% / Lycra 4% Made in US High density cushioning on foot bottom provides impact protection Custom shrink treated Merino wool holds its shape and wont shrink Reinforced heel and toe for a very long lasting sock Elastic arch support helps provide endurance for your feet Ring toe construction for a comfortable, invisible seam