DEFEET Women's Wooleator Socks 48% Merino Wool/ 24% Lycra/ 19% Nylon/ 9% Elastic Made in US 63% Wool, 26% Nylon, 10% Cordura, 1% Lycra Soft, breathable wool fibers capture moisture, facilitiates dry comfortable feet Reinforced heel and toe increases durability in high abrasion areas Machine wash cold, tumble-dry low, no chlorine bleach Made in the USA