DEFEET Woolie Boolie Socks 62% Merino Wool/ 15% Lycra/ 8% Nylon/ 5% Elastic Made in US 1.6" high 4.1" wide 64% Wool, 34% Nylon, 2% Lycra Soft, breathable wool fibers capture moisture, facilitiates dry comfortable feet Exterior reinfoced with abrasion resistant Nylon through foot and achlles zones Machine wash cold, tumble-dry low, no chlorine bleach Made in the USA