Darn Tough Women's Merino Wool Solid Basic Crew Light Socks - 6 Pack Special Offer 60% merino wool PAY FOR 5 AND GET THE 6th FOR FREE 60% Merino Wool, 37% Nylon, 3% Lycra Spandex Made in the USA, Unconditional Lifetime Guarantee Performance fit and Unsurpassed durability Women's Sizes: Small 4.5-7, Medium 7.5-9.5, Large 10-11.5