Darn Tough Vermont Women's Pebbles Crew Light Cushion Hiking Socks 46% Merino Wool, 51% Nylon, 3% Lycra Spandex Made in US Unconditional Lifetime Guarantee Performance fit and Unsurpassed durability Women's Sizes: Small 4.5-7, Medium 7.5-9.5, Large 10-11.5